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1、云南省元江县2013年国家农业综合开发高标准农田建设示范工程项目可行性研究报告4水资源评价及供需平衡分析4.1灌区水资源概况灌区地处低海拔的元江河谷中,四周地表各河流向河谷汇集,过境河流元江穿河谷而过,灌区地表水资源极为丰富。主要河流有清水河、南溪河、控制径流面积合计为746.6km2,灌区多年平均径流量达32776万m3(见表4-1)。灌区多年平均降水量为786.2mm,其中5至10月降水量与全年的79.6%,枯季11月至次年4月降水量较少,为全年降水量的20.4%,降水在年内分配极为不平衡。灌区用水主要从清水河、南溪河引水,分别通过漫漾大沟等引到灌区边缘,拟建灌区耕地分布高程均低
2、于此干渠沟尾沟底高程,灌区灌溉可实现自流灌溉。表4-1元江县红河街道办事处主要河流水资源量表河流名称流域面积(km2)多年平均径流量(万m3)不同保证率径流量P=20%P=50%P=75%P=90%清水河4941928023328.818894.415424.012917.6南溪河252.61349816332.613228.010798.49043.7合计746.63277639661.432122.426222.421961.34.2项目区水利工程特性灌区供水以水库蓄水工程与渠道引水工程相结合,截止2012年,灌区已建1座中型水库及小(一)型水库2座,蓄水总库容3598万m3,设
3、计可供水量为4257万m3,现状实际可供水量为3908.1万m3。其中:章巴水库控制径流面积36km2,水库大坝为均质土坝,坝高74m,总库容2338.3万m3,兴利库容2053.3万m3,防洪库容180万m3,死库容70.5万m3;乌布鲁水库控制径流面积13.4km2,水库大坝为均质土坝,坝高35m,总库容825.2万m3,兴利库容775.6万m3,防洪库容69.2万m3,死库容40.1万m3;南掌水库控制径流面积8km2,水库大坝为均质土坝,坝高44mplanning,andgovernmentfinancing,andwholevillagerelocation,andfirs
4、tbuiltHousplit"ofprinciples,insistedbigcommunityplanning,andlargedistricttransformation,breakadministrativedivisionsboundaries,optimizationtownspatialstructure,speedupnewCommunityconstruction,formednewcommunitylivebuilding,andintensivewithgroundproject,andenterprisetaxinsurancerunning,andExpand
5、employmentandimprovepeople'slivelihoodshedchangedeconomicchain.Thesecond,onpovertyreliefanddevelopmentworkinthisbattlethemissionobjectivesforpovertyalleviationinthefilearealreadyquiteclear,wastheprevioustwoyears(2016-2017)concentratedhard,threeyearsafter(2018-2020),consolidationandimprovement,b
6、ytheendof2017,theCounty......Apoorvillageand......Librarydistrictall"pickhat"and"five-ten",......Alltheruralpooroutofpoverty,stabilitytoachieve"twoworryaboutthree".Toaccomplishthesetasks,winthebattleforpovertyalleviation,thekeyistofindouttheway,selectingtherightbreakthrough,effectivenessinorder
7、toworkon.(A)toaccuratelyidentifyobjectsforpovertyalleviation.XIGeneralSecretarynotedthatthecriticaltimeofpovertyliesinprecision.Howtodoaccurate?'firsttaskistodobasicworksolid.Totaldemandisdowntovillage,household,persons,County,tow