山丘区集雨灌溉系统研究

Research on Rainwater Harvesting Irrigation System in Hilly Area

华北半干旱山丘区水资源短缺，雨水收集利用既有利于解决水资源短缺问题又能减少小流域洪峰。以天津蓟县山丘区坡面集雨利用为研究对象，根据当地水文气象条件提出了微区坡面径流量的计算方法，提出了集雨水窖容量及空间分布的确定方法；根据当地果树耗水规律制定了集雨补灌灌溉制度，提出了小管出流灌溉模式的技术参数。以天津蓟县西龙虎峪镇为例进行了典型设计，系统将集雨蓄集与灌溉利用相结合，应用效果良好，可为类似山丘区雨水蓄集灌溉利用工程的建设提供技术指导。

There is a shortage of water resource in semi-arid hilly area in North China. Rainwater harvesting utilization can solve the problem of water resource shoctage and reduce the flood peak in small basin. Take slop rainwater harvesting utilization in semi-arid hilly area as researched object in this paper. Based on the hydrological and meteorological conditions, the method of slop runoff in micro area was proposed, and rainwater harvesting cellar capacity and spatial distribution were de- termined. According to the fruit tree water consumption law, rainwater supplemental irrigation system was made. The hydraulic calculation of pipe network adopting small tube flow irrigation pattern was proposed. Then,typical design on longyu town in Tianjin was conducted. The results showed that this system combined rainwater collection with irrigation utilization, which can provide technical guidance for rainwater harvesting utilization engineering in hilly area.