涝水

在低洼易涝地下水位埋深较浅地区，采用适宜的排水措施是排除涝水和降低地下水位的一项行之有效的工程措施。

The drainage measure is a functional way for draining waterlogging and lowering groundwater table in the lower land and shallow groundwater depth and easy waterlogging regions .

本文运用大系统优化理论和分解&聚合方法，建立一个具有二层递阶结构的LP-DP模型，用以解决涝水在空间上和时间上的优化分配。

Using the large scale system optimal theory and the decomposition-aggregation method , a LP-DP model with two-level hierarchical structure is presented in this paper . It can be used to allocate runoff in space and time optimally .

通过控制涝水在稻田和排水沟中的滞留时间，增加排水沟口溢流堰高度，降低径流水力坡度和挟沙能力是控制排水的主要手段。

Controlled Drainage can be conducted through controlling drainage time from paddy field , enhancing the elevation of weir in drainage furrow , decreasing hydraulic slope of runoff and sediment-carrying capacity .

在一些半山半湖的地方，为了防止傍山产生的山洪水直接进入堤垸，转变成为涝水而成灾，根据不同的地形条件兴建傍山撇洪河，是洞庭湖区治涝的重要工程措施之一。

In the Dongting Lake District , in order to avoid storm water from the mountain area flow directly to the lake and then become disaster of waterlog , one of the main engineering measures is to build flood diversion river along the bottom of mountain to mitigate the flood .

结果表明，由于天津地势低洼易涝，地表水资源量大于35亿m3的丰水年，粮食减产；

The analysis shows that in the year with surface water resource more than 35 × 109m3 , the grain yield decreases , because there is a lot of water logged lowland in Tianjin ;

通过实施雨水利用能够防洪减涝、增加水资源可利用量、防止海水入侵和缓解地面沉降、回灌脱盐、补充生态环境用水，对区域生态环境的改善起到积极的作用，同时能节约优质水源。

The most effective way to restore the ecosystem is the rainwater utilization , which can prevent flood , increase the usable amount of water resource , avoid seawater intrusion , delay the ground sedimentation , doff soil salt , and recruit entironment water .