摘要
针对地表径流漫流模型进行沟谷网络提取过程中最优流量阈值确定的问题,提出并实现了基于多段迭代策略的流量阈值分析方法。结果表明,相较于传统的均值变点法,经多段迭代策略改良后的算法模型,采用可变步长的方法将拐点计算过程进行简化。在此过程中减少了对无效数据的计算,较大提高了最优流量阈值计算的效率。
Aiming at the problem of determining the optimal flow threshold in the process of extracting gully network from the surface runoff flooding model,a flow threshold analysis method based on multi-stage iterative strategy is proposed and implemented in this paper.The results show that compared with the traditional mean change point method,the algorithm model,improved by multi-stage iteration strategy,adopts the variable step length method to simplify the inflection point calculation process,and reduces the calculation of invalid data in this process,and greatly improves the efficiency of the optimal flow threshold calculation.
作者
刘宏建
杨富琨
刘斌
王位
LIU Hongjian;YANG Fukun;LIU Bin;WANG Wei(Information Engineering University,Zhengzhou 450001,China;32023 Troops,Dalian 116023,China)
出处
《测绘科学技术学报》
2025年第1期74-79,共6页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41471337,42201491)。
关键词
沟谷网络
最优汇流累积阈值
均值变点法
多段迭代策略
流量阈值
gully network
optimal confluence cumulative threshold
mean change point method
multi-stage iteration strategy
flow threshold
