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

本文研究了城市河流透水护岸的水环境功能及其养护技术的发展。本研究可以得出以下结论：摘要对明石河平野桥允许直堤段的局部冲刷情况进行了详细的实地调查，为测量洪水时的水流状况和冲刷深度做了准备。为建立合理的许用直堤设计，进行了试验研究。在此基础上，提出了可容许直堤周边局部冲刷的二维数值模拟方法，并将其应用于试验。通过数值与实验结果的对比，验证了该模型对冲蚀过程的预测能力。通过野外观测和物理环境模拟模型对明石河鱼类生境环境进行了评价。

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.