紫鹊界古梯田原生态自流灌溉机理研究

为揭示紫鹊界古梯田原生态自流灌溉机理,开展了水文气象观测、水文地质勘探、地下水位动态监测等调研工作。根据观测成果,提出了古梯田区域"等坡位地下蓄水库"及双线性自主调蓄理论,并据此建立了古梯田原生态自流灌溉水循环平衡计算模型。应用该模型对比模拟计算了古梯田原生态自流灌溉区域及周边人工灌溉区域水稻生育期灌溉水供需平衡过程、灌溉保证率,计算结果与实际情况高度吻合,深刻揭示了古梯田区域原生态自流灌溉机理。研究成果对我国其他古梯田开发利用与保护具有重要的指导意义,对坡耕地开发也具有重要的参考价值。

Mechanism of original gravity irrigation in Ziquejie Terrace

To reveal the mechanism of the original gravity irrigation of Ziquejie Terrace, several investigations had been devel-oped such as hydrological and meteorological observation, hydro-geological exploration and dynamic monitoring of groundwater level. According to the results,we proposed the theory of"the terrace ground water reservoirs on different levels" and the dual-linear self- regulation theory for the ancient terrace area. By using this model, the balancing process of the supply and demand of irrigation water and the irrigation guarantee rate were simulated in the growing period of rice in the original gravity irrigation ar-ea and its surrounding artificial irrigation area. The results showed that the simulation results and the measured results were high-ly consistent, which revealed the mechanism of ancient gravity irrigation in terrace area. The result has important directive signifi-cance to the exploitation and protection of the terrace in China and provides reference value to the exploitation of the slope farm-land.