کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6411349 1629928 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Examining the influence of river-lake interaction on the drought and water resources in the Poyang Lake basin
ترجمه فارسی عنوان
بررسی اثرات اثر متقابل رودخانه ای آکا و آبرنگ بر منابع خشکسالی و آب در حوضه دریاچه پوینانگ
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- The Poyang Lake River basin experiences six extreme droughts during the past 60 years.
- Drought in the upper Yangtze is one of the main causes for low water level in the Poyang Lake.
- The conjunction of extreme droughts coincided with the TGD impounding is the main cause of water shortage in the Poyang Lake.
- More researches on water resources in dam-induced river-lake interaction areas should be done.

SummaryIn recent years, the Poyang Lake basin is in a prolonged drought which has placed immense pressure on the water resources utilization. In this paper, we explore the spatial and temporal distributions of extreme droughts in the Poyang Lake basin by using the methods of SPI (Standardized Precipitation Index) and EOF (Empirical Orthogonal Function) for the period of 1956-2009, which are influenced by regional precipitation anomalies and river-lake interaction due to water impounding of the Three Gorges Dam (TGD). The results show that: (1) the Poyang Lake basin experienced six extreme droughts during the past 60 years, which lead to decreases in streamflow from five tributary rivers down to the Poyang Lake. The droughts in the 1960s and the 2000s were the most serious ones. However, there was an increasing trend of streamflow in the upper and middle Yangtze in the 1960s, and a decreasing trend appeared in the 2000s. The decline of streamflow in the upper Yangtze reaches has lowered the water level of lower Yangtze River which has caused more outflow from the Poyang Lake to the Yangtze River; (2) the operation of the Three Gorges Dam (TGD) has altered the seasonal pattern of flow regimes in the Poyang Lake and significantly reduced the water level in the lower Yangtze River during the TGD impounding period from late September to early November; and (3) the conjunction of extreme droughts in the Poyang Lake and the upper Yangtze reaches coincided with the impounding of the TGD is the main cause of the low water level in the Poyang Lake. Although the impact of the recent droughts in the Poyang Lake and upper Yangtze reaches has played a crucial role in the low water level of Poyang Lake, more attention should be paid to its sensitivity to the influence of the large dam-induced changes in the interaction between river and lake, particularly during impounding periods.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 522, March 2015, Pages 510-521
نویسندگان
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