摘要
水位是湖泊水文情势的主要特征指标,对湖泊的水量、水质和生物的栖息地等有直接或间接的影响,被认为是湖泊生态系统健康的关键影响因素.如何确定合理的湖泊水位以保证生态系统健康成为湖泊科学研究的重要科学问题.根据湖泊天然水位情势,从天然水文变化中识别多项反映完整水位过程的指标,构建了湖泊生态水位的计算方法.从湖泊天然水位情势中提取出高、低水位的历时、发生时间和变化率等水位指数来表征其生态水位.该方法弥补了传统湖泊生态水位计算方法仅给出最小生态水位的不足,体现了湖泊生态系统健康对水位过程的要求.基于提出的生态水位计算方法和鄱阳湖都昌水位站1952-2000年共49年的日均监测数据,计算了鄱阳湖的生态水位目标值区间,以期为鄱阳湖水利工程生态调度提供决策依据.
Water level is a major feature and indicator of hydrological regimes of lakes,as affecting water volume,water quality and habitat of lakes. It is considered as a key factor affecting ecosystem health of lakes. How to estimate an ecological water level for lakes has long been an important scientific issue in lake science research. Based on multiple-year water level data of the Lake Poyang,water level indicators were identified from natural water level regimes to build up a new water level for the lake. Water level indices based on natural regimes are grouped as duration,timing,and rate of change for high and low water levels to represent lake ecological water level. The proposed method based on this study can improve lake ecological water level estimation by supplying a more detailed description of water level process which is not available from the traditional methods. Based on this new method and daily water level data of Duchang Station in the Lake Poyang from 1952 to 2000,interval of ecological water level of the Lake Poyang was estimated to underpin the decision-making for ecological and water conservancy management of the Lake Poyang.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2015年第5期783-790,共8页
Journal of Lake Sciences
基金
江西省科技厅软科学计划项目(20122BBA10059)资助
关键词
湖泊
生态水位
生态需水量
鄱阳湖
水位变化
水文变化指标法
Lake
ecological water level
ecological water requirement
Lake Poyang
water level alteration
hydrology index method
