川中丘陵区小流域水资源供需平衡分析

摘要

This paper, taking the middle reaches of Jialing River basin as a typical example for a hilly area, selecting five kinds of crops widely grown the region with the modified Peng Man formula, analyzed the amount of water demand during their growing, and compared it with the amount of precipitation of 3 annual precipitation characteristics, it reached conclusion that the net irrigation water requirements in the watershed and distribution annually. During annual higher, average, lower precipitation, the net irrigation water demand in Lizixi watershed is of 13 7.58 million m3, 21414 million m3 and 21 296 million m3 respectively. It pro- rides the information and reference for the carrying out of the reservoir project design, soil conservation and agriculture development in the region.%针对川中丘陵区,以该地区内嘉陵江中游的李子溪流域为典型代表,选取5种川中丘陵地区广泛种植的农作物,用修正的彭曼公式分析其生长期需水量;同时与3个降水特征年的降水量进行对比,得出了流域全年净灌溉需水量缺额及年内分布。丰、平、枯降水年下,李子溪流域净灌溉需水量分别为13 758万m3、21414万m3和21296万m3。为该地区今后集蓄工程的设计、农业的发展和水土保持工作的开展提供参考和借鉴。