典型年三峡水库不同调度方式对洞庭湖区水情的影响研究(英文)

Based on the field-survey prototype hydrology data in typical years,the effect dur-ing the running periods of different dispatch modes of the Three Gorges Reservoir on the water regimes in Dongting Lake area is comparatively analyzed.The results are shown as follows.(1) The influence periods are from 25 May to 10 June,from 1 July to 31 August,from 15 September to 31 October and from December to the next April,among which the influence of the water-supplement dispatch in the dry season is not very sensitive.(2) During the period under the pre-discharge dispatch,the runoff volume slightly increases as well as both the average water level and the highest water level rise in the usual year.While in the wet and dry years,the average increase in the runoff volume is 40.25×108 m3 and the average rises of the average water level and the highest water level are both 1.06 m.(3) As for the flood-storage dispatch,the flood volume increases slightly,in the dry and wet years,the flood volume,the average water level and the highest water level averagely reduce by 444.02×108 m3,2.64 m and 1.42 m respectively.(4) Under the water-storage dispatch,the runoff volume slightly in-creases and the water level heightens in a sort in the usual year.And in the dry and wet years,the average decreases in the runoff volume,the average water level and the highest water levels are respectively 185.27×108 m3,3.13 m and 2.14 m.(5) During the period under the water-supplement dispatch,the runoff volume,the average water level and the highest water levels averagely decline by 337.7×108 m3,1.89 m and 2.39 m respectively in the usual and wet years.However,in the dry year,the runoff volume increases as well as the average and highest water levels slightly go up.     

三峡水库不同调度方式运行期洞庭湖区的水情响应

运用1951-2002 年典型年实测原型水文资料,对比分析2003-2010 年三峡水库不同调度方式运行期对洞庭湖区水情的影响,结果表明：(1) 影响时间为每年5 月25 日-6 月10 日、7 月1 日-8月31 日、9 月15 日-10 月31 日、12 月-次年4 月,其中枯期补水调度的影响不很敏感;(2) 预泄调度,平水年径流有所增加,平均水位、最高水位均有上升。丰、枯年影响期径流增加平均值40.25 ×10⁸ m³;平均水位抬高平均值1.06 m,最高水位壅高平均值1.06 m;(3) 蓄洪调度,平水年洪水量稍有上涨,枯、丰年影响期洪水减少平均值444.02 × 10⁸ m³,平均洪水位降低平均值2.64 m,最高洪水位降低平均值1.42 m;(4) 蓄水调度,除平水年影响期径流增加、水位稍有壅高外,枯、丰年影响期径流减少平均值185.27 × 10⁸ m³,平均水位降低平均值3.13 m,最高水位降低平均值2.14 m;(5) 补水调度,平、丰年影响期径流减少平均值337.7 × 10⁸ m³,平均水位降低平均值1.89 m,最高水位降低平均值2.39 m,但枯水年影响期径流量增加、平均水位与最高水位稍有抬高。关键词：长江三峡水库;调度方式;洞庭湖区;水情变化