基于GNSS-IR的长江大通站水位动态响应与旱涝风险评估

doi:10.13474/j.cnki.11-2246.2025.1116

测绘通报 ›› 2025, Vol. 0 ›› Issue (11): 104-109.doi: 10.13474/j.cnki.11-2246.2025.1116

基于GNSS-IR的长江大通站水位动态响应与旱涝风险评估

陈子龙¹, 金双根^1,2,3

1. 南京信息工程大学遥感与测绘工程学院, 江苏南京 210044;
2. 河南理工大学测绘与国土信息工程学院, 河南焦作 454003;
3. 中国科学院上海天文台, 上海 200030

收稿日期:2025-02-24 发布日期:2025-12-04
通讯作者: 金双根。E-mail:sgjin@shao.ac.cn
作者简介:陈子龙(2000—),男,硕士生,研究方向为GNSS-R。E-mail:czlgnssr@foxmail.com
基金资助:
河南省国际科技合作重点项目(241111520700)

Dynamic water level responses and drought-flood risk assessment at Yangtze River Datong station from GNSS-IR

CHEN Zilong¹, JIN Shuanggen^1,2,3

1. School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China;
3. Shanghai Astronomical Observatory, Chinese Academy of Science, Shanghai 200030, China

Received:2025-02-24 Published:2025-12-04

摘要/Abstract

摘要： 受全球气候变化与人类活动的影响,河流水位动态变化更加复杂多样。旱涝灾害对流域生态安全和经济社会发展构成威胁。GNSS干涉反射测量(GNSS-IR)技术为其提供了一个新的观测手段,可以近实时监测水位动态响应和评估旱涝风险。本文利用长江大通地基GNSS多路径反射测量数据,反演了2023年8月—2024年7月的长江大通站水位,并结合水文与气象因子分析了水位动态响应特征及旱涝风险评估。结果显示,汛期水位动态主要受降水驱动,与径流变化趋势相似,表明强降水对水位具有直接推升作用;长期水位变化则呈明显的季节性和动态响应特征,与温度、降水和径流的相关系数分别为0.73、0.74和0.89。此外,基于标准化水位指数(SWI)识别了研究期间8个不同风险等级的旱涝事件,其中有3个区间达到中度旱/涝风险,均集中在2023年夏季,水位变化速率均超过0.1 m/d。试验对水位动态特征的分析与旱涝风险的评估,展现出GNSS-IR技术在河流水位监测中的性能和应用潜力。

关键词: GNSS-IR, 信噪比, 水位, 长江, 标准化水位指数

Abstract: Affected by the global climate change and human activities,the dynamics of river water levels have become increasingly complex and varied.Drought and flood disasters pose significant threats to the ecological safety and socio-economic development of river basins.Nowadays,GNSS interferometric reflectometry (GNSS-IR) provide a unique means to invert water levels and assess drought-flood risk.This study uses ground-based GNSS multi-path reflectometry data to invert water level data at the Yangtze River Datong station from August 2023 to July 2024,and analyzes water level dynamic response characteristics and drought-flood risk assessment in conjunction with hydrological and meteorological factors.The results show that during the flood season,water level dynamics are primarily driven by rainfall,exhibiting trends similar to changes in runoff,indicating that heavy rainfall events directly elevate water levels.Long-term water level changes exhibit clear seasonal and dynamic response patterns,with correlation coefficients of 0.73,0.74,and 0.89 for temperature,precipitation,and runoff,respectively.Additionally,based on the standardized water level index (SWI),eight drought and flood events of varying risk levels were identified during the study period.Three of these events reached moderate drought/flood risk,all concentrated in the summer of 2023,with daily average water level changes exceeding 0.1 m/d.The analysis of water level dynamics and the assessment of drought-flood risk demonstrate the performance and application potential of GNSS-IR technology in river water level monitoring.

Key words: GNSS-IR, SNR, water level, Yangtze River, standardized water-level index

中图分类号:

P228

陈子龙, 金双根. 基于GNSS-IR的长江大通站水位动态响应与旱涝风险评估[J]. 测绘通报, 2025, 0(11): 104-109.

CHEN Zilong, JIN Shuanggen. Dynamic water level responses and drought-flood risk assessment at Yangtze River Datong station from GNSS-IR[J]. Bulletin of Surveying and Mapping, 2025, 0(11): 104-109.

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基于GNSS-IR的长江大通站水位动态响应与旱涝风险评估

Dynamic water level responses and drought-flood risk assessment at Yangtze River Datong station from GNSS-IR

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