STUDY ON HYDRAULIC-ENVIRONMENTAL FUNCTIONS AND DEVELOPMENT OF MAINTENANCE TECHNIQUE FOR PERMIABLE REVETMENT IN URBAN RIVER

本文研究了城市河道围护结构的水环境功能及其维护技术的发展。本研究的结论如下：1.对赤石河平野大桥蓄水丁坝段的局部冲刷进行了详细的现场勘察，为测量洪水河势和冲刷深度做了准备工作。在此基础上，提出了溢流丁坝周边局部冲刷的二维数值模拟方法，并应用于试验研究。通过野外观测和赤石河物理环境模拟模型，对赤石河鱼类的栖息地环境进行了评价。

THIS STUDY DEALS WITH HYDRAULIC-ENVIRONMENTAL FUNCTIONS AND THE DEVELOPMENT OF MAINTENANCE TECHNIQUE FOR PERMIABLE REVETMENT IN URBAN RIVER. THE CONCLISIONS OF THIS STUDY CAN BE DRAWN AS FOLLOWS.1.A DETAILD FIELD SURVEY WAS CARRIED OUT REGARDING LOCAL SCOUR AT THE SECTION OF HIRANO BRIDGE HAVING PERMIABLE SPUR DIKES IN AKASHI RIVER, PREPARATIONS FOR MEASURING STREAM CONDITIONS AND SCOUR DEPTH AT A FLOOD WERE MADE.2.THE EXPERIMENTS WERE CARRIED OUT TO ESTABLISH A REASONABLE DESIGN OF THE PERMIABLE SPUR DIKES. BASED ON THESE RESULTS, 2-D NUMERICAL SIMULATIONS FOR LOCAL SCOUR AROUND PERMIABLE SPUR DIKES WERE PROPOSED AND APPLIED TO THE EXPERIMENTS. COMPARING THE NUMERICAL AND EXPERIMENTAL RESULTS VERIFIED THE ABILITY OF THIS MODEL TO PREDICT THE SCOUR PROCESS.3.FISHES' HABITAT ENVIRONMENTALS WERE EVALUATED BY FIELD OBSERVATIONS AND A PHYSICAL ENVIRONTAL SIMULATION MODEL ON THE AKASHI RIVER.