GPM和TRMM降水产品在横断山区降雨侵蚀力估算中的应用

doi:10.13474/j.cnki.11-2246.2025.0606

测绘通报 ›› 2025, Vol. 0 ›› Issue (6): 30-36,77.doi: 10.13474/j.cnki.11-2246.2025.0606

• 学术研究 • 上一篇

GPM和TRMM降水产品在横断山区降雨侵蚀力估算中的应用

段崎燕¹, 陈国坤^1,2,3, 冯俊鑫⁴, 张开琴¹, 王颖¹

1. 昆明理工大学国土资源工程学院, 云南昆明 650093;
2. 云南省定量遥感重点实验室, 云南昆明 650093;
3. 云南省山地灾害天空地一体化智慧监测国际联合实验室, 云南昆明 650093;
4. 北京师范大学地理科学学部, 北京 100875

收稿日期:2024-10-29 发布日期:2025-07-04
通讯作者: 陈国坤。E-mail:chengk@radi.ac.cn
作者简介:段崎燕(2002—),女,硕士生,主要研究方向为遥感图像处理与信息分析。E-mail:qiyanduan@stu.kust.edu.cn
基金资助:
云南省科技厅基础研究计划面上项目(202401AT070366;202501AT070326)

Application of GPM and TRMM precipitation products in estimating rainfall erosivity in Hengduan Mountains

DUAN Qiyan¹, CHEN Guokun^1,2,3, FENG Junxin⁴, ZHANG Kaiqin¹, WANG Ying¹

1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Yunnan Key Laboratory of Quantitative Remote Sensing, Kunming University of Science and Technology, Kunming 650093, China;
3. Yunnan International Joint Laboratory for Integrated Sky-Ground Intelligent Monitoring of Mountain Hazards, Kunming 650093, China;
4. Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

Received:2024-10-29 Published:2025-07-04

摘要/Abstract

摘要： 降雨侵蚀力是表征降水及其径流导致土壤侵蚀潜在能力的关键指标,常通过站点实测资料获取。然而,在广大高原山区,气象站点极度稀缺且分布不均,导致数据的代表性较差,选择合适的降水产品成为区域水土保持防治工作的主要难题。针对这一问题,本文以滇西北横断山区为例,结合地面实测数据,评估了IMERG、T3B42和TP1km 3种降水产品在年、季、月尺度上的适用性,并分析了降雨侵蚀力的时空分布特征。结果表明:①IMERG在各时间尺度上的降水量估算精度最佳;②在年尺度上,IMERG和T3B42高估了降雨侵蚀力,而TP1km低估;在月尺度上,三者均低估;③降雨侵蚀力总体呈现由西南向东北递减的趋势。作为全球降水观测计划(GPM)的代表性降水产品,IMERG能够为该区域提供可靠的降雨侵蚀力信息。

关键词: 气象卫星产品, 降水, 降雨侵蚀力, 横断山区, GPM, TRMM

Abstract: Rainfall erosivity is a key indicator to characterize the potential of rainfall and its runoff to cause soil erosion, and is often obtained through field data. However, in the vast plateau mountainous areas, meteorological stations are extremely scarce and unevenly distributed, resulting in poor data representativeness. How to select appropriate precipitation products has become a major problem in regional soil conservation prevention and control. To address this, this study takes the Hengduan Mountain area in northwestern Yunnan as an example, and combines ground-based field data to evaluate the applicability of three precipitation products, IMERG, T3B42 and TP1km, on annual, seasonal and monthly scales, and analyzes the spatio-temporal distribution characteristics of rainfall erosivity. The results show that: ①IMERG provides the most accurate rainfall estimates across all time scales;②On the annual scale, both IMERG and T3B42 tend to overestimate rainfall erosivity, while TP1km underestimates it; on the monthly scale, all three products underestimate it; ③Rainfall erosivity generally decreases from southwest to northeast. As a representative precipitation product of the global precipitation measurement(GPM), IMERG offers reliable rainfall erosivity information for this region.

Key words: meteorological satellite products, precipitation, rainfall erosivity, Hengduan Mountains, GPM, TRMM

中图分类号:

P237

段崎燕, 陈国坤, 冯俊鑫, 张开琴, 王颖. GPM和TRMM降水产品在横断山区降雨侵蚀力估算中的应用[J]. 测绘通报, 2025, 0(6): 30-36,77.

DUAN Qiyan, CHEN Guokun, FENG Junxin, ZHANG Kaiqin, WANG Ying. Application of GPM and TRMM precipitation products in estimating rainfall erosivity in Hengduan Mountains[J]. Bulletin of Surveying and Mapping, 2025, 0(6): 30-36,77.

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GPM和TRMM降水产品在横断山区降雨侵蚀力估算中的应用

Application of GPM and TRMM precipitation products in estimating rainfall erosivity in Hengduan Mountains

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