摘要
洞庭湖对荆江径流有高效率的调节作用 ,根据长系列水文资料分析表明 ,荆江径流经调节后 ,年平均径流量、汛期径流量与汛枯期径流比分别减少了 2 6 .3%、32 .9%与 32 .4 % .年平均径流量与汛期径流量均呈沿程递减 .这些在长江干流都是独一无二的 .下荆江的流量最大变化幅度系数 Qk 为 0 .892 ,在长江干流属最小 .
The Dongting Lake has a high efficiency in regulating runoff of the Jingjiang Reaches of the Yangtze River. Based on the analysis of long term hydrological data, after the regulation of runoff, the annual average runoff amount, runoff amount of flood season and ratio of runoff amount of flood season to dry season decreased by 26.3%, 32.9% and 32.4%, respectively. Annual average runoff amount and runoff amount of flood season decreased along the river. All these are quite unique in the main stream of the Yangtze River. The maximum discharge amplitude Q k is 0.892 in the lower Reaches of the Jingjiang River which is the smallest among the main stream of the Yangtze River.
出处
《湖泊科学》
EI
CAS
CSCD
2000年第2期105-110,共6页
Journal of Lake Sciences
基金
江苏省自然科学基金!( BK990 1 9)
国家自然科学基金!( 492 71 0 1 0 )项目
关键词
洞庭湖
荆江
径流
洪道
湖泊调节作用
Dongting Lake, Jingjiang River, runoff, flood channel, regulation effect of lake