洞庭湖调蓄作用分析
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摘要
洞庭湖作为长江中游的一个吞吐式大型湖泊,调蓄荆江洪水并调节湖南省湘江、资水、沅江、澧水四水水沙泄入长江。洞庭湖的调蓄相当于大型水库调节,然而又与水库调蓄有所区别。该文从分流分沙比、调蓄量以及削峰系数等几个方面来分析洞庭湖调蓄作用。并提出了洞庭湖区以适度退田还湖,蓄洪区采用退人不退耕的单退还湖方式,增加其调蓄能力,缓解自身防洪压力的有效措施。
Covering a large scale of area,the Dongting Lake takes in and sends out large quantity of water and sand in middle reaches of the Yangtze River. It stores the flood from the Jingjiang River and xiang-zi-yuan-li rivers, and finally drains it into the Yangtze River, but there are still some differences between the Dongting Lake flood absorption and reservoir absorption. By analyzing the storage of floodwater in the Dongting Lake,the power of partial flow and the modulus of flood peak decrement, this paper gets the conclusion that the capacity of flood storage of the Dongting Lake is decreased gradually, and gives some advices to improve it, such as to reuse farmland for lake and control the water inflow in the flood diversion area.
Covering a large scale of area,the Dongting Lake takes in and sends out large quantity of water and sand in middle reaches of the Yangtze River. It stores the flood from the Jingjiang River and xiang-zi-yuan-li rivers, and finally drains it into the Yangtze River, but there are still some differences between the Dongting Lake flood absorption and reservoir absorption. By analyzing the storage of floodwater in the Dongting Lake,the power of partial flow and the modulus of flood peak decrement, this paper gets the conclusion that the capacity of flood storage of the Dongting Lake is decreased gradually, and gives some advices to improve it, such as to reuse farmland for lake and control the water inflow in the flood diversion area.
引文
① 蔡大富 ,段文忠 ,郑亚慧 .洞庭湖区防洪对策研究 .第十四届全国水动力学研讨会文集 .
[1] 段文忠,郑亚慧,刘建军.长江城陵矶—螺山河段水位抬高及原因分析[J].水利学报,2001(2):29-34.
[2] 粱杏,张人权,皮建高,等.洞庭盆地第四纪构造活动特征[J].地质科技情报,2001,20(2):11-14.
[3] 武鹏林,霍德敏,马存信,等.水利计算与水库调度[M].北京:地震出版社,2000.15-40.
[4] 李景保.近数十年洞庭湖湖盆形态与水情的变化[J].海洋与湖沼,1992,23(6):626-634.
[5] 张人权,粱杏,陈国金,等.长江中游盆地地质环境系统演变与防洪对策[J].长江流域资源与环境,2000,9(1):104-111.
[6] 黄怀勇,杜国铨,陈广浩,等.洞庭湖蓄洪能力讨论[J].大地构造与成矿学,1999,23(3):267-273.
[7] 姜加虎,黄群,许朋柱,等.长江中游洞庭湖地区江湖整治刍议[J].湖泊科学,1999,11(3):193-198.
[1] 段文忠,郑亚慧,刘建军.长江城陵矶—螺山河段水位抬高及原因分析[J].水利学报,2001(2):29-34.
[2] 粱杏,张人权,皮建高,等.洞庭盆地第四纪构造活动特征[J].地质科技情报,2001,20(2):11-14.
[3] 武鹏林,霍德敏,马存信,等.水利计算与水库调度[M].北京:地震出版社,2000.15-40.
[4] 李景保.近数十年洞庭湖湖盆形态与水情的变化[J].海洋与湖沼,1992,23(6):626-634.
[5] 张人权,粱杏,陈国金,等.长江中游盆地地质环境系统演变与防洪对策[J].长江流域资源与环境,2000,9(1):104-111.
[6] 黄怀勇,杜国铨,陈广浩,等.洞庭湖蓄洪能力讨论[J].大地构造与成矿学,1999,23(3):267-273.
[7] 姜加虎,黄群,许朋柱,等.长江中游洞庭湖地区江湖整治刍议[J].湖泊科学,1999,11(3):193-198.
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