Transformation between Surface Water and Groundwater under the Influence Development of Agriculture in Arid Region of Northwest China

Transformation between Surface water and Ground water affords possibility for Utilization Ratio of water resources in the Shiyang River Region. Upstream the blind expansion irrigate area, causes the water resources over development utilization. The study indicated that, the only irrigated area amounted to 2.1 hectares to 1989, caused to enter the downriver the river runoff failure even to block the flow, Middle and lower reaches Shiyang River the year ultra picks the quantity to above reach 5×10⁸ m³, only the Minqin Basin year ultra picks the quantity to above reach 4×10⁸ m³, the downriver ground water hardness index by every year 0.1g/L speed growth, the downriver had the serious ecology problem.