According to the geomorphologic characteristics of the loess hilly and gully area in Linxian County,it is revealed that the terrain of Linxian county is as follows:it inclines from northeast to southwest,and the elevation difference of riverbank is 1267 m.Through the data analysis method,the regional profile is calculated,and the morphological changes of the foreshore beach of Linxian river are analyzed.Finally,an experimental study is carried out on the restoration of river shoreline erosion.The results show that the erosion amount reaches the maximum in July 2021 and June 2022,and the erosion amount in summer and autumn is greater than that in spring and winter,mainly due to the effect of waves on the beach,especially the SW wave is almost perpendicular to the shoreline and directly affects the beach.The innovative point of this study is to focus on the influence of the erosion rate of the beach in front of the opposite bank of the riprap protection project,in order to contribute to the study of shoreline erosion.
In order to solve the problem of water pollution caused by urban drainage system,this paper takes a river storage tank as the research object,analyzes and generalizes its rainwater pipe network planning,discusses the factors affecting the efficiency and safety of rainwater discharge.The research results show that:With the increase of reservoir storage capacity,pollutant reduction rate also increases.In order to achieve the best water quality improvement effect,the drainage volume of the effective volume of the storage tank should be increased as much as possible.The larger the storage capacity,the higher the pollutant removal rate.The effective volume of stormwater regulating pond plays an important role in improving the water quality of stormwater runoff.Stormwater regulating pond is a simple and effective measure to control initial stormwater pollution.
The transport and diffusion process of pollutants in urban rivers was analyzed,and the field data were obtained by the experimental method of placing fluorescent agent in a river,and a convective diffusion model was established to quantitatively describe the migration and mixing process of solute in a river.This model can predict the concentration of pollutants in the downstream river when the concentration of pollutants in the upstream river is known,so that the downstream water quality can be judged in time and the pollution control measures can be effectively taken.
随着淮南市田家庵城市建设发展,曹咀孜排水区可调蓄水面越来越小,地表径流系数变大,曹咀孜涵的排涝压力越来越大,同时城市排涝标准提高,现有曹咀孜涵标准不足,现状规模已不能满足使用要求.为了有效提高曹咀孜涵排涝能力,保障曹咀孜排水区内人民的生命财产安全,需要对淮南市田家庵区曹咀孜涵排涝工程进行重新规划和设计.
