长江干流九江段与鄱阳湖不同季节的同位素特征  

Stable isotope characteristics in the Poyang Lake region at Jiujiang section of the Yangtze River in different seasons

作　　者：詹泸成[1] 陈建生[1,2] 黄德文[1] 王涛[1] ZHAN Lucheng CHEN Jiansheng HUANG Dewen WANG Tao(College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China College of Earth Sciences and Engineering, ttohai University, Nanjing 210098, China)

机构地区：[1]河海大学土木与交通学院,江苏南京210098 [2]河海大学地球科学与工程学院,江苏南京210098

出　　处：《水利学报》2016年第11期1380-1388,共9页Journal of Hydraulic Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB417005)

摘　　要：为了分析不同时期鄱阳湖与长江及其他各条河流的关系,初步探讨三峡水库运行对鄱阳湖水量的影响,对九江段长江干流、鄱阳湖地区河水、湖水进行了采样和氘氧稳定同位素分析。结果表明:水体同位素存在明显的时间和空间变化,可用于揭示湖泊与河流之间的关系。三峡补水调度过程能有效减少鄱阳湖春季的水量流失,4月份鄱阳湖流域已进入雨季,大量内河来水导致鄱阳湖水以较大的流量向长江补给;调洪削峰调度阶段,较高的长江水位对鄱阳湖存在一定的顶托作用,导致湖水难以排泄;三峡蓄水过程引起的长江水位降低加速了枯水期鄱阳湖水的流失。三峡水库的调度需要考虑到鄱阳湖流域水情,以免加重该流域丰水期的洪涝灾害和枯水期的水资源短缺。In order to find out the relationship between the Poyang lake and the Yangtze River and otherinflowing rivers, and to objectively discuss the influence of the Three Gorges Reservoir＇s operation on thelake, samples of river water and lake water in the Poyang Lake region at Jiujiang section of the YangtzeRiver were taken and analyzed for stable isotopic composition. The isotopic composition of rivers and lakesshows a great temporal and spatial variation, which can be used to reveal the relationship between thelake and rivers. The water-supply dispatch effectively reduces the water loss of the lake in spring. InApril,the lake greatly recharges the Yangtze River because of the considerable flow volume of inflowing riv-ers which have just entered rainy season. During the flood storage dispatching period,the high water levelof the Yangtze River restrains the discharge of lake water. The lower water level of the Yangtze Rivercaused by the impoundment dispatch greatly accelerates the water discharge of the Poyang Lake during itsdry season. Thus,the water regime of the Poyang Lake basin should be taken into consideration during thedispatches of the Three Gorges Reservoir,alleviating possible floods in wet season and droughts in dry sea-son.

关 键 词：鄱阳湖 长江 三峡水库 调度 稳定同位素 

分 类 号：P343[天文地球—水文科学]