论文部分内容阅读
江苏省里下河地区位于淮河洪泽湖水库下游,东滨黄海,南近长江,总面积1.9万余平方公里。这个地区四边高中间低,是个碟形洼地,历史上是个浅海湾,由黄河和长江的泥沙淤积而成;土壤和地下水含盐;东部沿海垦区地形较高,以种植棉花为主,西部水网圩区,入海比降仅二十万分之一,以种植水稻为主,是我省主要粮棉基地之一。解放前,淮河洪水经常泛滥成灾,台风过境又加重了涝灾程度和海潮的威胁,旱年河网水位枯落,卤水又乘机倒灌。这种种自然因素再加反动政府不重视水利建设,致使这个地区存在着“洪、涝、
The Lixiahe area of Jiangsu Province is located in the lower reaches of Hongzehu Reservoir in the Huaihe River, the Yellow Sea in the east coast and the Yangtze River in the south. The total area is 19,000 square kilometers. The low elevation on the four sides of the area is a dish-shaped depressions. Historically, it is a shallow bay formed by the sedimentation of the Yellow River and the Yangtze River. The soil and groundwater are salty. The terrain of the eastern coastal reclamation area is relatively high. Cotton is mainly used for planting western water Mesh polder area, down into the sea only one hundred millionth of one in order to grow rice-based, is one of the main grain and cotton base in our province. Before the liberation, the Huaihe River flood often flooded, the typhoon transit has increased the degree of floods and the tide of the threat of dry river network litter, brine and took the opportunity. This kind of natural factors coupled with the reactionary government does not attach importance to water conservancy construction, resulting in the existence of ”floods, floods,