Guanzhong Basin is located in the center of Shaanxi province. It is also the center of political, economy and culture as one of sixteen key construction regions. But Guanzhong Basin is arid and semi-arid climate zone. The water resources occupation of per person can not reach one sixth of the country. With rapid development of agriculture and industry, coupled with sharp expansion of population in recent years, water demands is adding and water resources becomes lacking. So it is urgent to deepl...