贺江河道生态流量研究

Study on Ecological Flow in Hejiang River

以贺江干流信都和古榄两控制性水文站长系列水文数据为基础,采用水文学方法,开展贺江河道生态流量研究。经过对不同计算方法的结果做分析比较,选择90%保证率最枯月平均值法、年内展布计算法的计算结果分别作为河道基本生态流量的生态基流和全年流量,信都站和古榄站的生态基流为26.5、34.6 m 3/s,全年流量为58.8、87.0 m 3/s;采纳频率曲线法的计算结果作为河道目标生态流量,信都站和古榄站的全年流量为83.9、121.0 m 3/s。研究成果旨在为今后贺江流域管理与保护提供理论支撑,同时为完善区域水资源合理配置提供参考依据。

Based on the series of hydrological data from the controlling hydrological station of Xindu and Gulan in the mainstream of Hejiang River,this paper uses hydrological methods to study ecological flow in Hejiang River.After analyzing and comparing the results of different calculation methods,the calculation results of the 90%guarantee rate of the driest month average method and the annual exhibition calculation method are selected as the ecological base flow and the annual volume of the basic ecological flow in the river.The ecological base flow of Xindu Station and Gulan Station are 26.5 and 34.6 m 3/s,and the annual volumes are 58.8 and 87.0 m 3/s;the calculation result of the frequency curve method is taken as the target ecological flow in the river,and the annual volume of Xindu Station and Gulan Station is 83.9 and 121.0 m 3/s.The research results aim to provide theoretical support for the management and protection of Hejiang River in the future and serve as a reference for improving the rational allocation of regional water resources.