开封市水分生产率变化分析

Analysis of Water Productivity Change in Kaifeng City

为了研究开封市水分生产率的变化情况 ,利用开封市历年 (1974～ 1998年 )的灌溉用水量、作物种植情况、产量等大量的历史背景资料 ,分析了开封市灌溉用水量及灌溉水分生产率的变化情况 ,从而分析出开封市水分生产率的主要影响因素 。

In order to research water productivity change in Kaifeng City, the irrigation water use and irrigation water productivity changes of Kaifeng City are analyzed according to historical background data of irrigation water use, cropping pattern and production of 1974～1998 in Kaifeng City. Thus, the major factors influencing water productivity in Kaifeng City are analyzed, and the major measures for increasing water productivity are pointed out.