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首页 水资源

水资源.ppt

水资源

淋雨一直走_58558
2013-12-30 0人阅读 举报 0 0 暂无简介

简介:本文档为《水资源ppt》,可适用于外语资料领域

WaterResourcesinChinaWaterResourcesinChinaWaterResourcesWaterResourcesWhichfourmainelements(元素)includinginwaterresourcesChina‘swatersituation:AnnualmeanprecipitationismminChina,withanestimateddischargeofbillionm³,billionm³inshallowgroundwaterresource,andanaggregateannualvolumeofbillionm³ 年平均降水量为毫米估计中国排放立方米亿立方米的浅层地下水资源以及总额亿立方米的年销量。PrecipitationinvariousregionsofChinadiffersgreatlyandunevenlyindistributionasaresultofChina’smonsoonclimate,topography(地形),andgeomorphy(地貌)Intheeastrainfallisgenerallyheavy,whereasthewesthasverylittlerainfallmeanwhile,thesouthhasheavyrainfall,whereasthenorthhasverylittlerainfallAtthesametime,Chinahavemorethenriverswhosecatchmentareaisoverk㎡,andriverswhosecatchmentareaisoverk㎡Outofwhich,themostfamousriversareYangtzeRiver,YellowRiver,ZhujiangRiver,andHuaiheRiverBesides,thereareroughlylakesinChinaatotalstoragecapacityofbillionm³andasurfaceareaofk㎡WellknownfreshwaterlakesarePoyangLake,DongtingLake,TaihuLake,andHongzeLakeGroundwaterresourcesinthenationalannualaverageofaboutbillionm³,ofwhichbillionm³distributedinthemountainousregions,billionm³distributedintheplains,mountainsandplainsrepeattheexchangeofaboutbillionm³Becauseofthisvastquantityofwater,ChinaisrankedthesixthintheworldintermsofaggregateannualwaterresourcesHowever,theavailablewaterresourcesannuallypercapitainChinaisonlym³whichmakesChinaoneofthewatershortestcountriesoftheworldThescarcity(稀缺)ofwaterresourcesespeciallyinthenorthChina

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