Spatial and temporal variability of saturated areas during rainfall-runoff events

IF 2.4 4区环境科学与生态学 Q3 WATER RESOURCES

Journal Of Hydrology And Hydromechanics Pub Date : 2023-11-14 DOI:10.2478/johh-2023-0025

Patrik Sleziak, Michal Danko, Martin Jančo, Juraj Parajka, Ladislav Holko

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引用次数: 0

Abstract

Abstract Spatially distributed hydrological model Mike SHE was used as a diagnostic tool to provide information on possible overland flow source areas in the mountain catchment of Jalovecký Creek (area 22.2 km 2 , elevation range 820–2178 m a.s.l.) during different rainfall-runoff events. Selected events represented a sequence of several smaller, consecutive events, a flash flood event and two large events caused by frontal precipitation. Simulation of hourly runoff was better for runoff events caused by heavy rainfalls of longer duration than for the flash flood or consecutive smaller runoff events. Higher soil moisture was simulated near the streamflow network and larger possibly saturated areas were located mainly in the upper parts of mountain valleys. The most pronounced increase in the areal extent of possibly saturated areas (from 6.5% to 68.6% of the catchment area) was simulated for the event with high peak discharge divided by a short rainfall interruption. Rainfall depth exceeding 100 mm caused a large increase in the potentially saturated areas that covered subsequently half of the catchment area or more. A maximum integral connectivity scale representing the average distance over which individual pixels were connected varied for the selected events between 45 and 6327 m.

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降雨径流事件中饱和地区的时空变异

摘要利用空间分布水文模型Mike SHE作为诊断工具，对不同降雨径流事件下Jalovecký溪山区集水区(面积22.2 km 2，海拔820 ~ 2178 m a.s.l.)可能的坡面流源区域进行了分析。所选事件代表了几个较小的连续事件的序列，一个山洪事件和两个由锋面降水引起的大事件。逐时径流模拟对持续时间较长的强降雨引起的径流事件比对山洪或连续较小径流事件的模拟效果更好。河流网络附近土壤湿度较高，较大的可能饱和区主要位于山谷的上部。在高峰值流量和短降雨中断的情况下，可能饱和区域的面积范围增加最为明显(从6.5%增加到68.6%)。超过100毫米的降雨深度导致潜在饱和面积大幅增加，覆盖了随后一半或更多的集水区。对于所选的事件，表示单个像素连接的平均距离的最大积分连接尺度在45到6327 m之间变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal Of Hydrology And Hydromechanics 环境科学-水资源

CiteScore

4.20

自引率

5.30%

发文量

审稿时长

>12 weeks

期刊介绍： JOURNAL OF HYDROLOGY AND HYDROMECHANICS is an international open access journal for the basic disciplines of water sciences. The scope of hydrology is limited to biohydrology, catchment hydrology and vadose zone hydrology, primarily of temperate zone. The hydromechanics covers theoretical, experimental and computational hydraulics and fluid mechanics in various fields, two- and multiphase flows, including non-Newtonian flow, and new frontiers in hydraulics. The journal is published quarterly in English. The types of contribution include: research and review articles, short communications and technical notes. The articles have been thoroughly peer reviewed by international specialists and promoted to researchers working in the same field.