摘要
通过收集并整理长江宜昌至城陵矶河段枯水期34个水尺的水位数据,采用皮尔逊相关分析和自相关分析,研究各水尺之间的时空相关性,揭示了近十年来枯水期的水位时空变化特征。研究发现:1)该河段大部分水尺水位呈平稳变化趋势,其中铁铺、反嘴、城陵矶最大、最小枯水位差值在3.2 m以上;2)上下游水尺水位之间的相关系数最小为0.936,表明相邻水尺位置存在较强的水文连通性;3)历史水位在20个时间滑动窗口即历史7 d内对当前时刻水位产生了较大影响。研究成果可为理解长江中游水文环境动态变化提供参考,对水资源管理和防洪减灾具有重要意义。
By collecting and organizing the water level data from 34 water gauges during the dry seasons in Yichang-Chenglingji section of the Yangtze River,Pearson correlation analysis and autocorrelation analysis are used to study the spatial-temporal correlation among the gauges,revealing the characteristics of water level spatial-temporal changes during the dry seasons over the past decade.The research findings are as follows:1)The water levels at most gauges in this section have shown a stable trend,with the maximum and minimum dry water level differences at Tiepu,Fanzui,and Chenglingji being more than 3.2 meters.2)The correlation coefficient between upstream and downstream gauges is at least 0.936,indicating a strong hydrological connectivity between adjacent gauge locations.3)Historical water levels in a 20-time sliding window,i.e.,within the past 7 days,have a significant impact on the current water level.The research outcomes can provide reference for understanding the dynamic changes in the hydrological environment of the middle reaches of the Yangtze River,and are of great significance for water resources management and flood control and disaster reduction.
作者
汪静怡
何阳
舒紫默
WANG Jingyi;HE Yang;SHU Zimo(Changjiang Waterway Bureau Survey(Wuhan)Center,Wuhan 430010,China)
出处
《水运工程》
2025年第8期154-160,共7页
Port & Waterway Engineering
关键词
宜昌—城陵矶
枯水位
时空变化
相关分析
from Yichang to Chenglingji
low water level
spatial-temporal variation
correlation analysis
