土坝漫顶后冲沟网形成模拟  

Simulation on the Formation of Gully Network Due to Overtopping

作　　者：张强[1,2] 周扬[1] 

机构地区：[1]南昌工程学院水利与生态工程学院,南昌330099 [2]江西省水文水资源与水环境重点实验室,南昌330099

出　　处：《长江科学院院报》2016年第2期33-37,共5页Journal of Changjiang River Scientific Research Institute

基　　金：水利部公益性行业科研专项(201401039);江西省教育厅科技项目(GJJ14761);2012年江西省大学生创新创业训练计划资助项目(201211319011);江西省水利厅资助项目(KT201206)

摘　　要：根据土坝漫顶后冲沟网形成的特点,建立了能够模拟土坝漫顶后冲沟网形成的元胞自动机模型。在元胞自动机模型中采用坡降模式模拟水流运动,采用冲刷率公式模拟坡面冲刷,确定了坡面径流和坡面冲刷规则。在计算中考虑了地形随机起伏变化和坡面抗冲性能差异2个影响因素,得出不同因素对冲沟网形成的影响。结果表明:单一考虑地形随机起伏变化形成的冲沟网较顺直,综合考虑2个方面影响的计算结果比较合理。According to characteristics of the formation of gully network due to overtopping,we establish a cellular automata model to simulate the gully network formation. In the model of cellular automata,the water movement is sloping,and the rules of runoff and erosion of slope surface are determined by simulating slope surface erosion in association with the scour rate formula. Random topographic fluctuation and differences in anti- scouring performance of slope surface are taken into account in the calculation. Results indicate that the gully network is straight if only the random topographic fluctuation is considered,whereas the calculation result by considering the two factors is superior to that by considering single factor.

关 键 词：土坝 漫顶 冲沟网 元胞自动机 坡面径流 坡面冲刷 地形随机起伏变化 地面抗冲性能差异 

分 类 号：TV641.2[水利工程—水利水电工程]