阳曲县可收集雨水资源潜力的计算与分析

Calculation and Analysis of the Collectable Rainwater Resource Potential in Yangqu County

根据阳曲县1960-2005年的日降雨资料,分析了该地区降水量的年际和年内变化以及不同等级降水强度的降雨量与降水日数分布规律,最后通过调查区域下垫面各类型、面积以及径流系数,计算得出不同年型的可收集雨水利用潜力。结果表明,该区多年平均年降雨量为430.4mm,虽缺乏生活用水和灌溉用水,但存在具有一定强度的可集蓄降水过程,具备发展集雨农业的必要性和可行性。

According to the daily rainfall data of 46 years from 1960 to 2005 in Yangqu County, this paper analyzed the inter-annual and annual changes of rainfall as well as the distribution of rainfall and precipitation days under different levels of rainfall intensity, and finally calculated the collectable rainwater utilization potential of different years through various underlying surface type, area and runoff coefficient in surveyed region. The results indicated that the average annual rainfall of the area for many years is 430.4 mm. Although the domestic water and irrigation water is lacked, there exists a certain intensity collectable and storable rainfall, which proves the necessity and feasibility of developing rainwater harvesting agriculture in the region.