【摘要】 洞庭湖蓄洪的能力关系到缓和洞庭湖自身流域的洪峰压力 ,同时也关系到缓和长江下游的洪水水位。在洞庭湖现有泄流系数不变的情况下 ,要增加洞庭湖的蓄洪能力 ,主要有扩大蓄洪区和加高堤垸防洪高度。由于这两者都存在天然限制 ,所以 ,减少进入洞庭湖的总有效洪水入流量 ,也就是 ,实施全流域蓄水 ,包括有形蓄水 (大中型水库 )和无形蓄水 (水土保持 ) ,从而减少洞庭湖洪水总有效入流流量 ,才是治理洞庭湖的根本方向。更多还原

【Abstract】 The capacity of flood storage in Dongting Lake is directly relationship with the alleviation of flood pressure coming from Xiang Zi Yun Li Rivers. Meanwhile, as a tributary lake of the Yangtze river, the capacity of flood storage in Dongting Lake is also relationship with the alleviation of flood pressure to whole lower Yangtze drainage. At the same condition of flood outflow coefficient, to increase the capacity of flood storage in Dongting Lake, it mainly needs to enlarge the areas of water storage and to reinforce or pile up the embankment. As the two methods are confined by certain limits, it seems that to store water in whole drainage basin by visible storage (such as water storage reservoirs) and invisible storage (such as water and soil conservation) by the reduction of total floods inflow into Dongting Lake can be concerned as the fundamental direction for flood control in Dongting Lake.更多还原