Ka cika wannan magana: Ban da samar da wutar lantarki, an yi nufin cewa madatsar ruwa za ta ƙara yawan jiragen ruwa da za su iya wucewa ta Kogin Yangtze. Ta hanyar samar da sararin ajiyar ambaliyar ruwa, madatsar ruwa tana rage yuwuwar ambaliyar ruwa a kwarin da ke fama da Yankin Yangtze. A shekara ta 1931,
ambaliyar ruwa a kogin ta yi sanadiyar mutuwar mutane miliyan 4. A sakamakon haka, China ta dauki wannan aikin a matsayin babbar nasara ta zamantakewa da tattalin arziki, tare da tsara manyan turbines na zamani, da kuma matsawa zuwa iyakance hayakin iskar gas. Duk da haka, dam ya haifar da canje-canje na muhalli ciki har da haɗarin haɗarin ƙasa. Saboda wannan, dam din ya kasance mai rikitarwa a cikin gida da kuma kasashen waje.