{"id":18615,"date":"2025-09-01T12:00:04","date_gmt":"2025-09-01T11:00:04","guid":{"rendered":"https:\/\/letrat.eu\/?p=18615"},"modified":"2025-11-30T01:38:35","modified_gmt":"2025-11-30T00:38:35","slug":"the-three-gorges-dam-a-monument-of-power-and-sacrifice","status":"publish","type":"post","link":"https:\/\/letrat.eu\/?p=18615","title":{"rendered":"The Three Gorges Dam &#8211; A Monument of Power and Sacrifice"},"content":{"rendered":"<p>Scale: 22.5 GW capacity, world&#8217;s largest power station, completed 2012, displaced 1.4M people<\/p>\n<p><em>&#8230;testing the integration of data-points in maps, by using Leaflet&#8217;s scripts (behind which stands, and we shall express our gratitude to Volodymyr Agafonkin, an Ukrainian, from Kyiv). It can be expanded and used for many things involving interactive maps and geo-spatial elements. In this test, if you zoom out enough, you&#8217;ll discover many informative points around China&#8217;s hydrography and the systems connected with it (in 4 data-layers, see the legend, in different colors &#8211; water bodies (lakes, rivers), engineering projects, historical floods, ancient historical sites). Of course, this isn&#8217;t something &#8216;new&#8217;, it can be done by using Google maps, Meta maps, Microsoft Maps etc., we just wanted to make our own simple solution, clean, unpolluted : ) &#8211; S. Guraziu, Sky Division &#038; Logios, 2025)<\/em><br \/>\n&nbsp;<\/p>\n<div id=\"hydroMap\" style=\"width:100%;max-width:800px;height:620px;margin:10px auto;border:1px solid #ccc\"><\/div>\n<p><script>\n\/\/<![CDATA[\nfunction initMap() {\n\n\/\/ Create the map centered on the world\n    \/\/var map = L.map('disasterMap').setView([20, 0], 2);\n\n    \/\/ Centered on China\n    \/\/\/var map = L.map('disasterMap').setView([35.0, 105.0], 4) \n\n    \/\/ Centered on Wuhan\n    \/\/var map = L.map('hydroMap').setView([30.5, 114.3], 7); \n      var map = L.map('hydroMap').setView([30.823, 111.003], 13);\n\n\nL.tileLayer('https:\/\/server.arcgisonline.com\/ArcGIS\/rest\/services\/World_Imagery\/MapServer\/tile\/{z}\/{y}\/{x}', {\nattribution: 'Esri Maps'\n}).addTo(map);\n\n\/\/ Clean Esri map\n\/\/L.tileLayer('https:\/\/server.arcgisonline.com\/ArcGIS\/rest\/services\/World_Topo_Map\/MapServer\/tile\/{z}\/{y}\/{x}', {\n\/\/attribution: 'Esri, OpenStreet'\n\/\/}).addTo(map);\n\n\n    \/\/ Create layer groups\n    var hydrographyLayer = L.layerGroup();    \/\/ Water bodies (lakes, rivers)\n    var engineeringLayer = L.layerGroup();    \/\/ Engineering projects\n    var floodLayer = L.layerGroup();          \/\/ Historical floods\n    var historicalLayer = L.layerGroup();     \/\/ Ancient historical sites\n\n    \/\/ Add all layers to map\n    hydrographyLayer.addTo(map);\n    engineeringLayer.addTo(map);\n    floodLayer.addTo(map);\n    historicalLayer.addTo(map);\n\n    \/\/ Color palette function\n    function getColorByType(type) {\n        return type === \"hydrography\" ? \"#3498DB\" :   \/\/ Blue - Water bodies\n               type === \"engineering\" ? \"#27AE60\" :   \/\/ Green - Engineering\n               type === \"flood\" ? \"#E74C3C\" :         \/\/ Red - Floods\n               type === \"historical\" ? \"#8E44AD\" :    \/\/ Purple - Historical\n               \"#95A5A6\";                             \/\/ Gray - Other\n    }\n\n    \/\/ Size function based on importance\n    function getSizeByImportance(importance) {\n        return importance === \"major\" ? 10 :\n               importance === \"medium\" ? 8 :\n               importance === \"minor\" ? 6 :\n               4;\n    }\n\n    \n\n\n\n\/\/ 1. HYDROGRAPHY DATA (Lakes, Rivers)\n    var hydrographyData = [\n       {\n                    name: \"Poyang Lake\", \n                    type: \"lake\",\n                    area: \"3,210 km\u00b2\", \n                    volume: \"25.2 billion m\u00b3\",\n                    importance: \"Largest freshwater lake in China, regulates Yangtze floods\",\n                    lat: 29.146154, \n                    lng: 116.655904,\n                    note: \"Critical habitat for migratory birds, seasonal variation: 1,000-4,500 km\u00b2\"\n                },\n                {\n                    name: \"Dongting Lake\", \n                    type: \"lake\",\n                    area: \"2,820 km\u00b2\", \n                    volume: \"18.8 billion m\u00b3\", \n                    importance: \"2nd largest freshwater lake, Yangtze flood buffer\",\n                    lat: 29.316667, \n                    lng: 112.883333,\n                    note: \"Ancient 'Yunmeng Marsh' from Chinese poetry, shrunk 50% since 1950s\"\n                },\n\n{\n    name: \"South-North Water Transfer Project\", \n    type: \"canal\",\n    length: \"1,155 km\", \n    volume: \"44.8 billion m\u00b3\/year\",\n    importance: \"World's largest water transfer system\",\n    lat: 32.689167, \n    lng: 111.736389,\n    note: \"Diverts Yangtze water to arid north, cost: $62 billion\"\n},\n{\n    name: \"Qutang Gorge\", \n    type: \"gorge\",\n    length: \"8 km\", \n    depth: \"1,200 m\", \n    importance: \"Shortest but most dramatic of Three Gorges\",\n    lat: 31.038889, \n    lng: 109.533056,\n    note: \"Sheer cliffs rising vertically from river, navigational challenge\"\n},\n{\n    name: \"Wu Gorge\", \n    type: \"gorge\", \n    length: \"45 km\",\n    depth: \"1,000 m\",\n    importance: \"Most scenic gorge, mist-shrouded peaks\",\n    lat: 31.166667, \n    lng: 110.000000,\n    note: \"Famous 'Twelve Peaks' mythology, Goddess Peak legend\"\n},\n{\n    name: \"Xiling Gorge\", \n    type: \"gorge\",\n    length: \"66 km\", \n    depth: \"900 m\",\n    importance: \"Longest gorge, historically most dangerous\",\n    lat: 30.950000, \n    lng: 110.950000,\n    note: \"Site of numerous ancient shipwrecks, now tamed by dam\"\n},\n{\n    name: \"Jinsha River\", \n    type: \"river\",\n    length: \"2,308 km\", \n    discharge: \"4,471 m\u00b3\/s\",\n    importance: \"Upper Yangtze section, hydroelectric powerhouse\",\n    lat: 26.572000, \n    lng: 100.247000,\n    note: \"Name means 'Golden Sand', rich in mineral deposits\"\n},\n{\n    name: \"Yangtze River (Ch\u00e1ng Ji\u0101ng) at Wuhan\", \n    type: \"river\",\n    width: \"1.2 km\", \n    depth: \"25 m\",\n    importance: \"Primary commercial artery, divides Wuhan\",\n    lat: 30.595105, \n    lng: 114.299179,\n    note: \"Maximum flood depth recorded: 19m (1954)\"\n},\n{\n    name: \"Han River (H\u00e0n Ji\u0101ng) Confluence\", \n    type: \"river\",\n    width: \"0.4 km\", \n    depth: \"15 m\",\n    importance: \"Divides Wuhan into three districts\",\n    lat: 30.568914, \n    lng: 114.300293,\n    note: \"Joins Yangtze at Wuhan's geographic heart\"\n},\n{\n    name: \"East Lake (D\u014dng H\u00fa)\", \n    type: \"lake\",\n    area: \"33 km\u00b2\", \n    depth: \"4.5 m\",\n    importance: \"Largest urban lake in China\",\n    lat: 30.553000, \n    lng: 114.418000,\n    note: \"6x larger than Hangzhou's West Lake, surrounded by universities\"\n},\n{\n    name: \"Tangxun Lake\", \n    type: \"lake\",\n    area: \"47.6 km\u00b2\", \n    depth: \"3.7 m\",\n    importance: \"Second largest in Wuhan\",\n    lat: 30.452000, \n    lng: 114.321000,\n    note: \"Connected to East Lake, important flood regulation\"\n},\n{\n    name: \"Liangzi Lake\", \n    type: \"lake\",\n    area: \"304 km\u00b2\", \n    depth: \"4.2 m\",\n    importance: \"Shared with Huangshi City, major fishery\",\n    lat: 30.203000, \n    lng: 114.598000,\n    note: \"One of China's best preserved freshwater lakes\"\n},\n{\n    name: \"South Lake (N\u00e1n H\u00fa)\", \n    type: \"lake\",\n    area: \"7.6 km\u00b2\", \n    depth: \"2.8 m\",\n    importance: \"University district, surrounded by campuses\",\n    lat: 30.512000, \n    lng: 114.391000,\n    note: \"Famous cherry blossoms along shoreline\"\n},\n{\n    name: \"Liangxi Lake\", \n    type: \"lake\",\n    area: \"2.8 km\u00b2\", \n    depth: \"2.5 m\",\n    importance: \"Urban recreation, ecological restoration\",\n    lat: 30.578000, \n    lng: 114.332000,\n    note: \"Recently rehabilitated water quality\"\n},\n{\n    name: \"Wusi Lake\", \n    type: \"lake\",\n    area: \"1.2 km\u00b2\", \n    depth: \"2.1 m\",\n    importance: \"Neighborhood park, cultural activities\",\n    lat: 30.523000, \n    lng: 114.362000,\n    note: \"Named after May Fourth Movement\"\n},\n{\n    name: \"Niusan Lake\", \n    type: \"lake\",\n    area: \"0.8 km\u00b2\", \n    depth: \"1.8 m\",\n    importance: \"Community fishing, local tourism\",\n    lat: 30.631000, \n    lng: 114.402000,\n    note: \"Traditional carp farming for centuries\"\n},\n{\n    name: \"Houguan Lake\", \n    type: \"lake\",\n    area: \"4.3 km\u00b2\", \n    depth: \"3.2 m\",\n    importance: \"Historical site, Ming Dynasty relics\",\n    lat: 30.542000, \n    lng: 114.312000,\n    note: \"Ancient naval training ground\"\n},\n{\n    name: \"Yezhi Lake\", \n    type: \"lake\",\n    area: \"6.2 km\u00b2\", \n    depth: \"2.9 m\",\n    importance: \"Ecological wetland, bird sanctuary\",\n    lat: 30.671000, \n    lng: 114.224000,\n    note: \"Wintering ground for migratory birds\"\n},\n{\n    name: \"Qingling Lake\", \n    type: \"lake\",\n    area: \"3.1 km\u00b2\", \n    depth: \"2.4 m\",\n    importance: \"Drinking water source, protected area\",\n    lat: 30.478000, \n    lng: 114.452000,\n    note: \"Supports 20% of Wuhan's drinking water\"\n},\n{\n    name: \"Wuhan Yangtze Bridge Aqueduct\", \n    type: \"canal\",\n    length: \"3.2 km\", \n    width: \"12 m\",\n    importance: \"Major water supply conduit\",\n    lat: 30.549000, \n    lng: 114.288000,\n    note: \"Built 1957, survived multiple floods\"\n},\n{\n    name: \"Jianghan Canal System\", \n    type: \"canal\",\n    length: \"18 km\", \n    width: \"8 m\",\n    importance: \"Historical transportation network\",\n    lat: 30.581000, \n    lng: 114.273000,\n    note: \"Ming Dynasty commercial waterway, still operational\"\n},\n{\n    name: \"Hong Lake\", \n    type: \"lake\",\n    area: \"12.8 km\u00b2\", \n    depth: \"3.2 m\",\n    importance: \"Regional flood regulation\",\n    lat: 30.122710, \n    lng: 115.399130,\n    note: \"Important agricultural water source\"\n},\n{\n    name: \"Huanggai Lake\", \n    type: \"lake\",\n    area: \"38.5 km\u00b2\", \n    depth: \"4.1 m\",\n    importance: \"Major fishery, bird habitat\",\n    lat: 29.707291, \n    lng: 113.548047,\n    note: \"Ancient battle site (208 AD), historical significance\"\n},\n{\n    name: \"Dong Lake\", \n    type: \"lake\", \n    area: \"22.3 km\u00b2\",\n    depth: \"3.8 m\",\n    importance: \"Urban water supply, recreation\",\n    lat: 29.366211, \n    lng: 112.645334,\n    note: \"Part of Yueyang city water system\"\n},\n{\n    name: \"Xi Lake\", \n    type: \"lake\",\n    area: \"18.7 km\u00b2\", \n    depth: \"3.5 m\",\n    importance: \"Western counterpart to Dong Lake\",\n    lat: 29.344282, \n    lng: 112.561377,\n    note: \"Connected to Dong Lake via channels\"\n},\n{\n    name: \"Beicha Reservoir\", \n    type: \"reservoir\",\n    capacity: \"85 million m\u00b3\", \n    depth: \"28 m\",\n    importance: \"Drinking water storage\",\n    lat: 29.371149, \n    lng: 112.565746,\n    note: \"Primary water source for Yuanjiang City\"\n},\n{\n    name: \"Datong Lake\", \n    type: \"lake\",\n    area: \"126 km\u00b2\", \n    depth: \"5.2 m\",\n    importance: \"One of Hunan's largest lakes\",\n    lat: 29.214041, \n    lng: 112.509385,\n    note: \"Major rice irrigation source\"\n},\n{\n    name: \"Dongdongting Lake\", \n    type: \"lake\",\n    area: \"1,320 km\u00b2\", \n    depth: \"6.8 m\",\n    importance: \"Eastern section of Dongting Lake\",\n    lat: 29.314744, \n    lng: 112.947658,\n    note: \"Critical flood buffer for Yangtze River\"\n},\n{\n    name: \"Zhelin Reservoir\", \n    type: \"reservoir\",\n    capacity: \"7.9 billion m\u00b3\", \n    depth: \"45 m\",\n    importance: \"Jiangxi's largest reservoir\",\n    lat: 29.276597, \n    lng: 115.301138,\n    note: \"Hydropower generation: 180 MW\"\n},\n{\n    name: \"Lu Lake\", \n    type: \"lake\",\n    area: \"8.2 km\u00b2\", \n    depth: \"2.9 m\",\n    importance: \"Local irrigation, aquaculture\",\n    lat: 30.227118, \n    lng: 114.185648,\n    note: \"Traditional lotus root farming\"\n},\n{\n    name: \"Bao'an Lake\", \n    type: \"lake\",\n    area: \"15.3 km\u00b2\", \n    depth: \"3.4 m\",\n    importance: \"Urban recreation, ecological park\",\n    lat: 30.251227, \n    lng: 114.714454,\n    note: \"Recently developed waterfront promenade\"\n},\n{\n    name: \"Sanshan Lake\", \n    type: \"lake\",\n    area: \"6.8 km\u00b2\", \n    depth: \"2.7 m\",\n    importance: \"Three mountain scenic area\",\n    lat: 30.306756, \n    lng: 114.766666,\n    note: \"Named after three surrounding hills\"\n},\n{\n    name: \"Huama Lake\", \n    type: \"lake\",\n    area: \"22.1 km\u00b2\", \n    depth: \"3.9 m\",\n    importance: \"Agricultural water management\",\n    lat: 30.264987, \n    lng: 114.996076,\n    note: \"Important for cotton irrigation\"\n},\n{\n    name: \"Wanghu Lake\", \n    type: \"lake\",\n    area: \"18.9 km\u00b2\", \n    depth: \"3.6 m\",\n    importance: \"Flood control reservoir\",\n    lat: 29.862467, \n    lng: 115.335127,\n    note: \"Regulates Qingshui River flows\"\n},\n{\n    name: \"Shupo Hu Reservoir\", \n    type: \"reservoir\",\n    capacity: \"120 million m\u00b3\", \n    depth: \"32 m\",\n    importance: \"Regional water supply\",\n    lat: 29.833880, \n    lng: 115.389200,\n    note: \"Completed 1988, serves 500,000 people\"\n},\n{\n    name: \"Sai Lake\", \n    type: \"lake\",\n    area: \"9.4 km\u00b2\", \n    depth: \"3.1 m\",\n    importance: \"Natural wetland reserve\",\n    lat: 29.692346, \n    lng: 115.880822,\n    note: \"Protected bird nesting area\"\n},\n{\n    name: \"Ci Lake\", \n    type: \"lake\",\n    area: \"11.7 km\u00b2\", \n    depth: \"3.3 m\",\n    importance: \"Historical temple site\",\n    lat: 30.215010, \n    lng: 115.060278,\n    note: \"Ancient Buddhist temple on shoreline\"\n},\n{\n    name: \"Daye Lake\", \n    type: \"lake\",\n    area: \"68 km\u00b2\", \n    depth: \"4.8 m\",\n    importance: \"Major mining region water source\",\n    lat: 30.092107, \n    lng: 115.103880,\n    note: \"Supports copper mining operations\"\n},\n{\n    name: \"Haikou Lake\", \n    type: \"lake\",\n    area: \"24.5 km\u00b2\", \n    depth: \"3.7 m\",\n    importance: \"Yangtze floodplain lake\",\n    lat: 30.052592, \n    lng: 115.246874,\n    note: \"Natural flood storage basin\"\n},\n{\n    name: \"Meichuan Reservoir\", \n    type: \"reservoir\",\n    capacity: \"230 million m\u00b3\", \n    depth: \"38 m\",\n    importance: \"Hydroelectric power\",\n    lat: 30.157238, \n    lng: 115.625781,\n    note: \"Power capacity: 45 MW\"\n},\n{\n    name: \"Jingzhu Reservoir\", \n    type: \"reservoir\",\n    capacity: \"180 million m\u00b3\", \n    depth: \"35 m\",\n    importance: \"Irrigation and drinking water\",\n    lat: 30.138117, \n    lng: 115.688565,\n    note: \"Serves 300,000 agricultural users\"\n},\n{\n    name: \"Wuxue Lake\", \n    type: \"lake\",\n    area: \"14.2 km\u00b2\", \n    depth: \"3.5 m\",\n    importance: \"City water feature\",\n    lat: 30.184654, \n    lng: 115.569188,\n    note: \"Urban development focal point\"\n},\n{\n    name: \"Xianrenba Reservoir\", \n    type: \"reservoir\",\n    capacity: \"95 million m\u00b3\", \n    depth: \"30 m\",\n    importance: \"Mountain water storage\",\n    lat: 30.051057, \n    lng: 115.691294,\n    note: \"Named after 'Immortal Rock' formation\"\n},\n{\n    name: \"Dajin Reservoir\", \n    type: \"reservoir\",\n    capacity: \"150 million m\u00b3\", \n    depth: \"33 m\",\n    importance: \"Flood control and irrigation\",\n    lat: 30.026036, \n    lng: 115.618918,\n    note: \"Built 1978, reinforced 2015\"\n},\n{\n    name: \"Poyang Lake\", \n    type: \"lake\",\n    area: \"3,210 km\u00b2\", \n    depth: \"8.4 m\",\n    importance: \"China's largest freshwater lake\",\n    lat: 29.146154, \n    lng: 116.655904,\n    note: \"UNESCO wetland reserve, critical bird habitat\"\n},\n{\n    name: \"Junshan Lake\", \n    type: \"lake\",\n    area: \"28.5 km\u00b2\", \n    depth: \"4.2 m\",\n    importance: \"Poyang Lake satellite lake\",\n    lat: 28.547576, \n    lng: 116.324333,\n    note: \"Famous for Junshan Silver Needle tea\"\n},\n{\n    name: \"Yangfang Lake\", \n    type: \"lake\",\n    area: \"16.8 km\u00b2\", \n    depth: \"3.8 m\",\n    importance: \"Agricultural water management\",\n    lat: 28.528661, \n    lng: 116.527468,\n    note: \"Traditional fishing grounds\"\n},\n{\n    name: \"Qinglan Lake\", \n    type: \"lake\",\n    area: \"22.4 km\u00b2\", \n    depth: \"4.1 m\",\n    importance: \"Ecological conservation area\",\n    lat: 28.497464, \n    lng: 116.146679,\n    note: \"Blue-green algae monitoring site\"\n},\n{\n    name: \"Xinjiang River\", \n    type: \"river\",\n    length: \"359 km\", \n    width: \"280 m\",\n    importance: \"Poyang Lake tributary\",\n    lat: 28.523822, \n    lng: 116.773430,\n    note: \"Major shipping channel\"\n},\n{\n    name: \"Ganjiang River\", \n    type: \"river\",\n    length: \"991 km\", \n    width: \"450 m\",\n    importance: \"Longest Poyang Lake tributary\",\n    lat: 28.183481, \n    lng: 115.709118,\n    note: \"Drains 80,948 km\u00b2 watershed\"\n}\n\n    ];\n\n    \/\/ 2. ENGINEERING MARVELS DATA\n    var engineeringData = [\n\n{\n    name: \"Three Gorges Dam\", \n    type: \"dam\",\n    scale: \"22.5 GW capacity\", \n    importance: \"major\",\n    lat: 30.823333, \n    lng: 111.003333,\n    note: \"World's largest power station, completed 2012, displaced 1.4M people\",\n    image: \"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/a\/ab\/ThreeGorgesDam-China2009.jpg\/960px-ThreeGorgesDam-China2009.jpg\"\n},\n        {\n            name: \"South-North Water Transfer\", \n            type: \"canal\",\n            scale: \"1,155 km length\", \n            importance: \"major\",\n            lat: 32.689167, \n            lng: 111.736389,\n            note: \"World's longest water transfer system, moves 44.8 billion m\u00b3\/year\"\n        },\n        {\n            name: \"Dujiangyan Irrigation System\", \n            type: \"irrigation\",\n            scale: \"2,200 years operational\", \n            importance: \"major\", \n            lat: 31.004444, \n            lng: 103.605278,\n            note: \"World's oldest functioning irrigation system, built 256 BC\"\n        },\n        {\n            name: \"Gezhouba Dam\", \n            type: \"dam\",\n            scale: \"2.7 GW capacity\", \n            importance: \"major\",\n            lat: 30.744167, \n            lng: 111.273056,\n            note: \"First dam on the Yangtze River, completed in 1988\"\n        },\n        {\n            name: \"Xiluodu Dam\", \n            type: \"dam\",\n            scale: \"13.9 GW capacity\", \n            importance: \"major\",\n            lat: 28.255833, \n            lng: 103.638889,\n            note: \"Third largest hydroelectric plant in the world\"\n        },\n        {\n            name: \"Xiangjiaba Dam\", \n            type: \"dam\",\n            scale: \"6.4 GW capacity\", \n            importance: \"major\",\n            lat: 28.633333, \n            lng: 104.216667,\n            note: \"Gravity dam on the Jinsha River\"\n        },\n        {\n            name: \"Grand Canal\", \n            type: \"canal\",\n            scale: \"1,776 km length\", \n            importance: \"major\",\n            lat: 32.071111, \n            lng: 119.453333,\n            note: \"Longest canal in the world, UNESCO World Heritage Site\"\n        },\n        {\n            name: \"Zipingpu Dam\", \n            type: \"dam\",\n            scale: \"760 MW capacity\", \n            importance: \"medium\",\n            lat: 31.02, \n            lng: 103.57,\n            note: \"Controversial dam near the epicenter of the 2008 Sichuan earthquake\"\n        }\n    ];\n\n    \/\/ 3. HISTORICAL FLOOD DATA\n    var floodData = [\n        {\n            year: 1931, \n            name: \"Yangtze River Cataclysmic Flood\",\n            casualties: \"2.5M+\", \n            importance: \"major\",\n            lat: 30.595105, \n            lng: 114.299179,\n            note: \"Deadliest natural disaster of 20th century, inundated 180,000 km\u00b2\"\n        },\n        {\n            year: 1954,\n            name: \"Great Yangtze Flood\", \n            casualties: \"30,000+\",\n            importance: \"major\",\n            lat: 30.595105, \n            lng: 114.299179,\n            note: \"Prompted first serious plans for Three Gorges Dam\"\n        },\n        {\n            year: 1998,\n            name: \"Yangtze River Great Flood\",\n            casualties: \"3,000+\", \n            importance: \"medium\",\n            lat: 30.595105, \n            lng: 114.299179,\n            note: \"Final confirmation that Three Gorges Dam was necessary\"\n        },\n        {\n            year: 1870,\n            name: \"Yangtze River Flood of 1870\",\n            casualties: \"700,000+\", \n            importance: \"major\",\n            lat: 30.700000, \n            lng: 111.300000,\n            note: \"Largest recorded flood in the Yangtze Basin before modern dams\"\n        },\n        {\n            year: 1911,\n            name: \"Yangtze Flood of 1911\",\n            casualties: \"100,000+\", \n            importance: \"medium\",\n            lat: 30.356134, \n            lng: 112.190000,\n            note: \"Severe flooding that affected central China\"\n        },\n        {\n            year: 1935,\n            name: \"Yangtze Flood of 1935\",\n            casualties: \"142,000+\", \n            importance: \"medium\",\n            lat: 30.577716, \n            lng: 114.278553,\n            note: \"Another catastrophic flood just four years after the 1931 disaster\"\n        },\n        {\n            year: 2010,\n            name: \"Yangtze Floods of 2010\",\n            casualties: \"1,000+\", \n            importance: \"medium\",\n            lat: 29.800000, \n            lng: 114.300000,\n            note: \"Severe flooding that tested the Three Gorges Dam's capabilities\"\n        },\n        {\n            year: 2020,\n            name: \"Yangtze Floods of 2020\",\n            casualties: \"100+\", \n            importance: \"medium\",\n            lat: 30.400000, \n            lng: 114.900000,\n            note: \"Heavy flooding that caused billions in damages\"\n        }\n    ];\n\n    \/\/ 4. HISTORICAL SITES DATA\n    var historicalData = [\n        {\n            name: \"Dujiangyan Ancient System\",\n            year: -256,\n            type: \"historical\",\n            importance: \"major\",\n            lat: 31.004444, \n            lng: 103.605278,\n            note: \"2,200-year-old irrigation system still functioning today, UNESCO site\"\n        },\n        {\n            name: \"Fengjie Ancient Town\",\n            year: 0,\n            type: \"historical\",\n            importance: \"medium\",\n            lat: 31.046200, \n            lng: 109.523900,\n            note: \"Historic town at the entrance to the Qutang Gorge\"\n        },\n        {\n            name: \"Jingzhou Ancient City\",\n            year: 0,\n            type: \"historical\",\n            importance: \"medium\",\n            lat: 30.350000, \n            lng: 112.180000,\n            note: \"Historic city with well-preserved walls from Ming Dynasty\"\n        },\n        {\n            name: \"White Emperor City\",\n            year: 0,\n            type: \"historical\",\n            importance: \"medium\",\n            lat: 31.044444, \n            lng: 109.570278,\n            note: \"Historic fortress overlooking Qutang Gorge\"\n        },\n        {\n            name: \"Zhang Fei Temple\",\n            year: 0,\n            type: \"historical\",\n            importance: \"medium\",\n            lat: 30.949600, \n            lng: 108.706100,\n            note: \"Temple dedicated to Zhang Fei, a general from the Three Kingdoms period\"\n        },\n        {\n            name: \"Qu Yuan Temple\",\n            year: 0,\n            type: \"historical\",\n            importance: \"medium\",\n            lat: 30.827500, \n            lng: 110.971900,\n            note: \"Temple dedicated to Qu Yuan, famous poet and minister of Chu State\"\n        },\n        {\n            name: \"Yellow Crane Tower\",\n            year: 0,\n            type: \"historical\",\n            importance: \"major\",\n            lat: 30.546667, \n            lng: 114.298333,\n            note: \"Famous tower in Wuhan with over 1,700 years of history\"\n        },\n        {\n            name: \"Yueyang Tower\",\n            year: 0,\n            type: \"historical\",\n            importance: \"medium\",\n            lat: 29.380000, \n            lng: 113.090000,\n            note: \"Ancient tower beside Dongting Lake, dating back to Three Kingdoms period\"\n        }\n    ];\n\n\n\n\n\n\n\n\n\n    \/\/ FUNCTION TO ADD DATA TO LAYERS\n    function addToLayer(dataArray, layer, category) {\n        dataArray.forEach(function(item) {\n            var circle = L.circleMarker([item.lat, item.lng], {\n                color: getColorByType(category),\n                fillColor: getColorByType(category),\n                fillOpacity: 0.8,\n                radius: getSizeByImportance(item.importance || \"medium\"),\n                weight: 2\n            }).addTo(layer);\n\n\n\n\n\nvar popupContent = `<strong>${item.name}<\/strong>`;\nif (item.year) popupContent += ` (${item.year})`;\npopupContent += `<br \/>`;\n\nif (item.image) {\n    popupContent += `<img decoding=\"async\" src=\"${item.image}\" style=\"width:100%; max-height:150px; object-fit:cover; border-radius:5px; margin:5px 0;\"><br \/>`;\n}\n\nif (item.area) popupContent += `Area: <strong>${item.area}<\/strong><br \/>`;\nif (item.length) popupContent += `Length: <strong>${item.length}<\/strong><br \/>`;\nif (item.scale) popupContent += `Scale: <strong>${item.scale}<\/strong><br \/>`;\nif (item.casualties) popupContent += `Casualties: <strong>${item.casualties}<\/strong><br \/>`;\n\n\/\/ Add the note with proper line breaks\npopupContent += item.note.replace(\/\\|\/g, '<br \/>');\n\ncircle.bindPopup(popupContent);\n\n\n        });\n    }\n\n    \/\/ ADD ALL DATA TO THEIR LAYERS\n    addToLayer(hydrographyData, hydrographyLayer, \"hydrography\");\n    addToLayer(engineeringData, engineeringLayer, \"engineering\");\n    addToLayer(floodData, floodLayer, \"flood\");\n    addToLayer(historicalData, historicalLayer, \"historical\");\n\n    \/\/ ADD LAYER CONTROL UI\n    var overlayMaps = {\n        \"\ud83c\udf0a Water Bodies\": hydrographyLayer,\n        \"\ud83c\udfd7\ufe0f Engineering Projects\": engineeringLayer,\n        \"\ud83c\udf0a Historical Floods\": floodLayer,\n        \"\ud83c\udfdb\ufe0f Historical Sites\": historicalLayer\n    };\n    \n    L.control.layers(null, overlayMaps, {position: 'topright', collapsed: true}).addTo(map);\n\n    \/\/ ADD LEGEND\n    var legend = L.control({position: 'bottomright'});\n    legend.onAdd = function(map) {\n        var div = L.DomUtil.create('div', 'info legend');\n        div.style.backgroundColor = 'rgba(255, 255, 255, 0.9)';\n        div.style.padding = '12px';\n        div.style.borderRadius = '8px';\n        div.style.border = '1px solid #ddd';\n        div.style.boxShadow = '0 2px 6px rgba(0,0,0,0.2)';\n        \n        div.innerHTML = `\n            \n\n<h4 style=\"margin:0 0 10px 0; border-bottom:1px solid #eee; padding-bottom:5px;\">Map Legend<\/h4>\n\n\n            \n\n<div><span style=\"background:#3498DB; width:12px; height:12px; display:inline-block; border-radius:50%; margin-right:5px;\"><\/span> Water Bodies<\/div>\n\n\n            \n\n<div><span style=\"background:#27AE60; width:12px; height:12px; display:inline-block; border-radius:50%; margin-right:5px;\"><\/span> Engineering Projects<\/div>\n\n\n            \n\n<div><span style=\"background:#E74C3C; width:12px; height:12px; display:inline-block; border-radius:50%; margin-right:5px;\"><\/span> Historical Floods<\/div>\n\n\n            \n\n<div><span style=\"background:#8E44AD; width:12px; height:12px; display:inline-block; border-radius:50%; margin-right:5px;\"><\/span> Historical Sites<\/div>\n\n\n            \n\n<hr style=\"margin:8px 0;\">\n            <small>Circle size indicates importance<\/small>\n        `;\n        return div;\n    };\n    legend.addTo(map);\n}\n\n\/\/ Initialize the map\nif (window.topojson) {\n    initMap();\n} else {\n    window.addEventListener('load', initMap);\n}\n\/\/]]>\n<\/script><\/p>\n<p>&nbsp;<br \/>\n1919 &#8211; First Concept &#8211; Sun Yat-sen proposes idea for a dam on Yangtze River to control flooding<br \/>\n1954 &#8211; Devastating Floods &#8211; Yangtze River floods kill over 30,000 people, highlighting need for flood control<br \/>\n1992 &#8211; Official Approval &#8211; National People\u2019s Congress approves the project despite unprecedented opposition<br \/>\n1994 &#8211; Construction Begins &#8211; Official ceremony marks start of the 17-year construction project<br \/>\n2003 &#8211; First Power Generation &#8211; First generators become operational; ship locks begin functioning<br \/>\n2006 &#8211; Dam Completion &#8211; Main wall of dam reaches its final height of 181 meters<br \/>\n2012 &#8211; Full Operation &#8211; All 32 generators operational; becomes world\u2019s largest power station<br \/>\n2020 &#8211; Record Flood Control &#8211; Dam successfully manages largest flood peak since construction<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/a\/ab\/ThreeGorgesDam-China2009.jpg\/960px-ThreeGorgesDam-China2009.jpg\" width=\"960\" height=\"596\" class=\"alignnone size-full\" \/><\/p>\n<p>&nbsp;<br \/>\n<strong>The Three Gorges Dam: A Monument of Power and Sacrifice<\/strong><\/p>\n<p>The Three Gorges Dam on China&#8217;s Yangtze River is a testament to modern engineering ambition. Completed in 2012, it is the world&#8217;s largest power station by installed capacity, a title it holds not just as a mark of technical prowess but as a symbol of China&#8217;s rapid development and its immense energy needs.<\/p>\n<p><strong>The Scale of Achievement<\/strong><br \/>\nWith a staggering generating capacity of 22,500 Megawatts, the dam harnesses the mighty Yangtze to produce an immense amount of clean(er) hydroelectric power. This electricity fuels the industrial heartland of central China, powering millions of homes and businesses while theoretically reducing the reliance on coal-fired plants, a significant step for the country&#8217;s environmental goals.<br \/>\nBeyond power generation, the dam was designed for two other critical purposes: flood control and navigation improvement. For centuries, the Yangtze&#8217;s seasonal floods have been catastrophic, claiming hundreds of thousands of lives throughout history. The dam&#8217;s reservoir is designed to absorb these floodwaters, protecting downstream cities like Wuhan and Nanjing. Additionally, it has transformed the river&#8217;s gorges into a series of deep-water locks, enabling larger cargo ships to travel deep into China&#8217;s interior, boosting economic connectivity.<\/p>\n<p><strong>The Weight of Its Legacy<\/strong><br \/>\nHowever, the dam&#8217;s legacy is inextricably linked to its immense human cost. To create the vast reservoir that stretches for hundreds of kilometers behind the dam, an estimated 1.4 million people were displaced from their homes, ancestral towns, and farmlands. Entire cities, countless historical sites, and vast swathes of fertile land now lie submerged beneath the water.<br \/>\nThe resettlement process was one of the largest of its kind in human history. While the government undertook a massive effort to build new towns and cities, the process was fraught with challenges. Many displaced residents faced difficulties adapting to new environments, finding new livelihoods, and receiving adequate compensation, leading to significant social upheaval and controversy that continues to be discussed today.<br \/>\nFurthermore, the project has had significant environmental consequences. The alteration of the river&#8217;s ecosystem has impacted fish populations and biodiversity, and the reservoir has become a trap for industrial pollution and silt, which affects water quality and the long-term stability of the dam itself.<\/p>\n<p><strong>A Balanced Perspective<\/strong><br \/>\nThe Three Gorges Dam, therefore, stands as a complex symbol. It is undeniably a masterpiece of engineering that provides clean energy and protects millions from floods. Yet, it is also a powerful reminder that progress on such a colossal scale carries profound sacrifices. It represents the fundamental trade-off between national development and individual displacement, between harnessing nature and altering it irrevocably.<br \/>\nIt is not merely a wall of concrete, but a monument to both human ingenuity and the heavy price that is sometimes paid for it.<br \/>\n&nbsp;<br \/>\n&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scale: 22.5 GW capacity, world&#8217;s largest power station, completed 2012, displaced 1.4M people &#8230;testing the integration of data-points in maps, by using Leaflet&#8217;s scripts (behind which stands, and we shall express our gratitude to Volodymyr Agafonkin, an Ukrainian, from Kyiv).&hellip; <a href=\"https:\/\/letrat.eu\/?p=18615\" class=\"more-link\">Lexo <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,24],"tags":[],"class_list":["post-18615","post","type-post","status-publish","format-standard","hentry","category-multimedia","category-skyd"],"_links":{"self":[{"href":"https:\/\/letrat.eu\/index.php?rest_route=\/wp\/v2\/posts\/18615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/letrat.eu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/letrat.eu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/letrat.eu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/letrat.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18615"}],"version-history":[{"count":0,"href":"https:\/\/letrat.eu\/index.php?rest_route=\/wp\/v2\/posts\/18615\/revisions"}],"wp:attachment":[{"href":"https:\/\/letrat.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/letrat.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/letrat.eu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}