【摘要】 区域节水效果的常规评价方法都是利用单项指标评价单一行业的或者单方面的节水效果,不能反映区域综合节水效果。本文从耗水控制水平和地下水可持续利用的角度出发,提出了以目标蒸散量(ET)和地下水位理论变幅为评价基准,利用遥感技术监测区域实际蒸散量和地下水位实际变幅,采用基准比较法评价区域节水综合效果的方法;并以北京市大兴区为例,开展了该区的综合节水效果遥感评价,为区域综合节水效果评价提供了新的思路。更多还原

【Abstract】 The efficacy of water saving efforts in a region is often evaluated using only a single index measuring a specific industry or user,seldom examining the overall effect of efforts over the whole of the region.In this paper,a new method,referred to as baseline comparison,is used to evaluate the overall effect of water saving efforts in a region to determine the water utilization rate as well as the level at which water use is sustainable.The method takes target evapotranspiration(ET) and the theoretical change in groundwater level as the evaluation baseline,which is then compared with two evaluation indices:actual regional evapotranspiration(ET) and actual change in groundwater level calculated by remote sensing.This method is applied in Daxing District of Beijing,producing evaluation results consistent with measurements.A new evaluation method of the overall effect of water saving efforts in a region is proposed.更多还原