滆湖退圩还湖工程设计与水土流失预测研究

Study on Design of the Project of Returning Polders to the Gehu Lake and Soil Erosion Prediction

摘要:

为提高滆湖的防洪调蓄能力，保证湖泊功能的整体发挥，针对滆湖近岸带水生态修复高新区嘉泽片区工程，开展了退圩还湖工程设计和水土流失预测研究。进行工程设计时，因退圩还湖区域总面积达2.381 7 km²，还湖底高程范围为1.50~3.10 m，因此结合现状地形采用了保留现状鱼塘肌理和不保留鱼塘肌理2种地形塑造模式，同时利用Civil 3D软件计算得到工程总挖方量为259.50万m³，总填方量为160.64万m³；进行水土流失预测时，将项目划分成不同计算单元，预测得到水土流失量为1 080.69 t，新增水土流失量为782.09 t。根据研究结果，提出了相应的水土保持防治措施，以控制工程建设中的水土流失。

Abstract:

In order to improve the flood control and storage capacity of the Gehu Lake and ensure the overall function of the lake, the design of the project of returning polders and soil erosion prediction research for the Gaoxin and Jiaze area of the Gehu Lake nearshore waters was carried out. The total area of the project's reclamation and lake return area is 2.381 7 km², and the designed elevation range of the lake return bottom is 1.50~3.10 m. Two terrain shaping modes, retaining the current fish pond texture and not retaining the fish pond texture, were adopted according to the current terrain. The total excavation volume of the project was calculated using Civil 3D software to be 2.595 million m³, and the total filling volume was 1.606 4 million m³. The project was divided into different calculation units for soil erosion prediction, and the predicted soil erosion volume was 1 080.69 t, with an additional soil erosion volume of 782.09 t. Corresponding soil conservation prevention measures were proposed to control soil erosion of the project.