西安市水资源情况.doc

西安市水资源情况
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
1 自然与社会经济状况
西安市是陕西省省会，世界著名的历史文化名城，是我国中西部地区重要的教育\国防科技工业和高新技术产业基地。西安地处八百里秦川腹地，地质地貌有秦岭山区、骊山丘陵区、黄土台塬区及关中的渭河平原区，是陕西省粮、棉、油、瓜果、蔬菜生产的重要基地。


西安市位于关中平原腹地，八百里秦川中部的渭河两岸。地理坐标北纬33°39′～
34°45′，东经107°40′～109°49′，东西长204Km,南北最大宽约116Km，面积10108Km2。地形南高北低，呈阶梯结构，从南向北依次排列着秦岭山地、黄土丘陵沟壑，黄土台塬、山前冲洪积扇，渭河及其支流冲击平原。平原地区高程400m左右，黄土台塬区500～700m之间，浅山丘陵区500～1000m，秦岭中高山区800～3000m，秦岭山地是西安市水资源涵养区。

西安市属于暖温带半干旱、半湿润大陆性季风气候。℃，日照时数1684～2243h,～2，无霜期220d左右，最大冻土厚度为45cm。，其中秦
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
,，，，降水受地形影响明显，总趋势由北向南逐渐增加，最低值在渭北，，，相差近一倍。降水量年内分布不均，多集中在7、8、9、10四个月，占全年总降水量60%以上，%。蒸发量在地区分布上与降水量相反，