烂竹冲水库时段汛限水位设置与洪水资源化利用

The Setting of Flood Limit Water Level during the Period of Langzhuchong Reservoir and the Utilization of Flood Resources

为解决益阳市双季稻种植区水库防洪蓄水及灌溉水资源调度问题,实现洪水资源安全利用,以益阳市赫山区烂竹冲水库为例,对水库气象水文特征、水库蓄水供水情况等进行研究,分析传统调度方式的不足之处,研究烂竹冲水库汛限水位分时段动态水位设置。结果表明,通过汛限水位分时段动态设置,在每年梅雨期后期设置动态汛限水位为75.11~76.11 m,烂竹冲水库可以增加蓄水15.86万m~3以上,为灌区耕地多提供一次以上全面灌溉水源,缓解益阳市灌溉水源短缺、防洪与水库兴利矛盾问题,为该地区水资源调度的决策服务提供参考。

In order to solve the problems of flood control,water storage,and irrigation water resource scheduling in the double cropping rice planting area of Yiyang City,and to achieve the safe utilization of flood resources,taking the Lanzhuchong Reservoir in Heshan District of Yiyang City as an example,this paper studies the meteorological and hydrological characteristics of the reservoir,the water storage and supply situation of the reservoir,analyzes the shortcomings of traditional scheduling methods,and studies the dynamic water level setting of the flood limit water level of the Lanzhuchong Reservoir in different periods.The results show that by dynamically setting the flood limit water level in different time periods and setting a dynamic flood limit water level of 75.11~76.11 meters in the later stage of the rainy season each year,the Lanzhuchong Reservoir can increase its water storage capacity by more than 158600cubic meters,providing more than one comprehensive irrigation water source for farmland in the irrigation area,alleviating the shortage of irrigation water sources and the contradiction between flood control and reservoir development in Yiyang City,and providing reference services for decisionmaking in water resource scheduling in the region.