径流汇流模拟的河道高程修正方法研究

干旱气象 ›› 2019, Vol. 37 ›› Issue (4): 676-682.

径流汇流模拟的河道高程修正方法研究

郭海燕^1,3，陈军²，徐沅鑫^1,3，徐金霞^1,3

（1.四川省气候中心,四川成都610072;2.成都信息工程大学资源与环境学院,四川成都610225;
3.高原与盆地暴雨旱涝灾害四川省重点实验室,四川成都610072）

出版日期:2019-08-30 发布日期:2019-09-04
作者简介:郭海燕（1979— ），女，山西吕梁人，高级工程师，主要从事气象灾害风险与气候影响评估研究. E-mail: ghy-824@163.com。
基金资助:
四川省科技厅项目（2017JY0157）和高原与盆地暴雨旱涝灾害四川省重点实验室研发项目共同资助

Study on Method of River Course Elevation Correction to Improve Accuracy of Runoff Confluence Simulation

GUO Haiyan ^1,3, CHEN Jun ², XU Yuanxin ^1,3, XU Jinxia ^1,3

(1. Climate Center of Sichuan Province, Chengdu 610071, China;
2.College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;
3. Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China)

Online:2019-08-30 Published:2019-09-04

摘要/Abstract

摘要： 以涪江流域中游为研究区域，利用细化算法和线划跟踪算法提取河道水面的中心线，按照一定间隔采样，得到河道采样点高程。通过河道采样点初始高程，推算出河道水流方向后，对采样点进行高程修正，以确保采样点高程从上游到下游逐渐降低。最后，将采样点高程进行空间插值，并替换原有河道地形高程。结果表明，河道高程修正后，径流汇流精度得到提升。

关键词: 径流汇流模拟, 河道高程修正, 涪江流域中游

Abstract: In this paper, the middle reaches of the Fujiang River was chosen as the study area, the tessellate algorithm and line tracing algorithm were applied to extract the central line of the river water surface, and then the elevation sampling points were obtained at a certain interval.The flow directions were calculated through the initial elevation values of the sampling points, then the elevation of the sampling points were corrected according to the flow direction results to ensure that the elevation of the sampling points declined from upstream to downstream. The initial digital elevation of river course was replaced by the interpolated result of the sampling points. The results show that the accuracy of runoff and confluence was improved after correcting elevation of the river course.

Key words: , runoff confluence simulation, river elevation correction, the middle section of the Fujiang River

中图分类号:

P343

郭海燕, 陈军, 徐沅鑫, 徐金霞. 径流汇流模拟的河道高程修正方法研究[J]. 干旱气象, 2019, 37(4): 676-682.

GUO Haiyan, CHEN Jun, XU Yuanxin, XU Jinxia. Study on Method of River Course Elevation Correction to Improve Accuracy of Runoff Confluence Simulation[J]. Journal of Arid Meteorology, 2019, 37(4): 676-682.