应用生态学报2017，Vol.28Issue(8)：2554-2562,9.DOI:10.13287/j.1001-9332.201708.029
水文变异下长江荆南三口河道内生态需水量变化及贡献因素
Variation of ecological water demand and its contributing factors in the southern three outlets of Jingjiang River in the Yangtze River under the condition of hydrologic variation
摘要
Abstract
Based on the measured original runoff data series at five hydrological stations in the southern three outlets of Jingjiang River in the Yangtze River from 1951 to 2015,variation years of runoff were tested by Mann-Kendall methods.Instream ecological water demands in the southern three outlets of Jingjiang River were calculated through GEV's maximum flow of probability density.Spatial temporal variation of ecological water demand and its contributing factors were analyzed from the perspective of multi temporal and spatial scales.The results showed that,in the studied periods,the first variation years of runoff were respectively 1990,1959,1959,1972 and 1972 at five hydrological Stations of Xinjiangkou,Shadaoguan,Kangjiagang,Guanjiapu and Mituosi.The monthly average flow sequence before the first variation was used as the hydrological sequence before hydrological variation.Under the conditions of hydrological variation,the ecological water demands each month were respectively 69.63,26.15,55.65,452.65,2166.44,4660.83,10875.66,9966.49,7868.38,4773.60,1655.01 and 338.49 m3 · s-1 from January to December.The average annual ecological water demands in the five hydrological stations of Xinjiangkou,Shadaoguan,Kangjiagang,Guanjiapu and Mituosi were 901.57,507.00,221.30,1438.03 and 581.62 m3 · s-1 respectively.After the hydrologic variation,the frequency of meeting instream ecological water demand decreased significantly from more than 55％ before the hydrologic variation to less than 20％ after the hydrologic variation in the three outlets of southern Jingjiang River,and the shortage of ecological water demand became very serious.The main factors affecting the spatial and temporal changes of ecological water demand in the southern three outlets of Jingjiang River in the Yangtze River were human activities of water conservancy projects in the different periods and water consumption in different industries.关键词
生态需水量/水文变异/荆南三口Key words
ecological water demand/hydrological variation/the southern three outlets of Jingjiang River引用本文复制引用
何蒙,吕殿青,李景保,代稳,徐志..水文变异下长江荆南三口河道内生态需水量变化及贡献因素[J].应用生态学报,2017,28(8):2554-2562,9.基金项目
本文由国家自然科学基金项目(41571100)、湖南省重点学科建设项目(2011001)和湖南省教育厅重点项目(16A129)资助 This work was supported by the National Natural Science Foundation of China (41571100),the Key Discipline Construction of Hunan Province (2011001) and the Key Project of Education Department of Hunan Province (16A129). （41571100）
