广东省北部山区多水源点中型灌区灌溉水量平衡方法分析

Analysis on Irrigation Water Balance Method for Medium Irrigation Area with Multiple Water Sources in Northern Mountainous Areas of Guangdong Province

广东省北部山区由于地形、河流分布等特殊原因,存在多个水源点的灌区较多,此类灌区水源点往往空间上分散、水量分布不均,灌区的供需水量平衡分析计算较平原地区灌区更为复杂。文章以牛鼻岩灌区为例,在分析流域概况的基础上,对灌区可利用水量与灌溉需水量进行计算,通过协调上下游水源点的来水量与灌溉范围的可供水量与需水量,实现了灌区供需水量平衡,以满足灌区用水量要求。

Due to special reasons such as terrain and river distribution in northern mountainous area of Guangdong Province,there are many irrigation areas with multiple water sources.The water sources in such irrigation areas are often spatially dispersed and the water volume distribution is uneven.The analysis and calculation of water supply and demand balance in irrigation areas is more complicated than that in plain areas.Taking Niubiyan Irrigation Area as an example,based on the analysis of the general situation of the basin,the available water volume and irrigation water demand in the irrigation area are calculated.By coordinating the water inflow from upstream and downstream water sources with the available water supply and demand in the irrigation area,the balance of water supply and demand in the irrigation area is realized to meet the water consumption requirements of the irrigation area.