Study On Influence Of Water Conservancy Project Of Fu River Basin On Water System Connectivity

At this stage,many experts and scholars study and analyze the connectivity of the basin.Most of the research methods are based on the geometric level,hydrological level,physical level,chemical level or some indicators in the geographic level to evaluate the water system connectivity.The research and analysis method of water system connectivity at the geometric and physical levels optimizes the hydrological connectivity calculation formula based on the hydrological level to evaluate the connectivity of the water system based on comprehensive indicators in the three regions of the Fu River Basin,which can reflect the degree of connectivity and hydrological processes in the basin.The connection between the water system and the real layout of the water system.The gate and dam within the basin have great influence on the connectivity of the water system,and have certain influence on the water ecological environment.Based on ArcGIS platform to fondle connectivity of river basin water system space analysis,longitudinal connectivity analysis,lateral connectivity analysis and the dendritic connectivity index analysis,comparative analysis the advantages and disadvantages of these methods,found that dendritic connectivity index analysis method considering comprehensive,can study well sites for its influence on river basin connectivity.The research shows that the passability of sluice dam,its geographical location and quantity in the basin have great influence on the water system connectivity.It can be directly proportional to the connectivity of the river basin,and the stronger the capability is,the higher the connectivity level of the river basin will be.The more locks and DAMS there are in a river basin,the lower the connectivity level will be.In view of the bad influence of sluice dam on drainage basin connectivity,this paper proposes a priority method based on DCI index to determine the priority of sluice dam removal to restore and improve drainage basin connectivity.The results show that the removal sequence of the five DAMS determined by the priority technology is better than the random removal of the five DAMS to achieve the recovery of the connectivity of the river basin,which will provide help for the decision-making process of improving the recovery of the connectivity of the river basin in the future.