Impact of irrigating farmland increase production with water save on groundwater exploitation in the plain of Hutuo River basin

It is indicated that the successive grain total yield increase leads to the accordingly increasing groundwater exploitation in the plain of Hutuo River basin since 1953,and that the saving level of irrigating in the farmland is rised while the rate of groundwater exploitation is reduced.The groundwater exploitation will actually increase the grain total yield up to 142.3×10⁸m³/yr according to the average intensity of exploiting groundwater(3.11 m³/kg)for the irrigating farmland from 1953 to 1970,which is 117.9×10⁸m³/yr more than the practical exploitation(24.4×10⁸m³/yr).The exploitation increases averagely 2.45×10⁸m³/yr in each five years by the grain increasing according to the averagly intensity of exploiting groundwater(0.53m³/kg)for the irrigating farmland from 2001 to 2005,and increases averagly 11.74×10⁸m³/yr in each five years according to the average intensity of exploiting groundwater(3.11 m³/kg)from 1953 to 1970.Therefore,the importance means of relaxing the status of the exceed exploiting groundwater in Hebei Plain is to fight drought,water save crop energetically and to regulate reasonably the agriculture planting structure.