Spatiotemporal variability of minimum runoff generating areas: a field investigation

IF 2.8 3区环境科学与生态学 Q2 WATER RESOURCES

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques Pub Date : 2023-03-28 DOI:10.1080/02626667.2023.2195558

K. Panjabi, R. Rudra, Rituraj Shukla, N. Shrestha, P. Goel, P. Daggupati, Bahram Gharabaghi

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Abstract

ABSTRACT Past studies described several dominant factors responsible for minimum runoff-generating areas (MRGAs) which are seldom backed by field observations. Here, soil moisture and runoff data for 45 rainfall events were collected from a small (21.62 ha) agricultural watershed in Ontario, Canada, using a remotely operated wireless sensor network system. The relationship developed between MRGA and basin moisture index (M) indicated that MRGAs are insensitive up to the threshold M value of 25 cm. A higher M leads to an exponential increase in the MRGA. Various factors (e.g. rainfall amount) affecting the spatiotemporal variability of MRGA were then identified. Statistical analyses (e.g. F-test) indicated a strong seasonal influence and showed that MRGA during spring, summer, and fall seasons was 34.3%, 8.0%, and 13.6%, respectively. The relationship of MRGA with rainfall amount, initial soil moisture content and rainfall intensity was the strongest for the summer season followed by fall and then spring.

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最小产流区时空变化:野外调查

摘要过去的研究描述了导致最小产流面积（MRGA）的几个主要因素，这些因素很少得到现场观测的支持。在这里，使用远程操作的无线传感器网络系统，从加拿大安大略省的一个小（21.62公顷）农业流域收集了45次降雨事件的土壤湿度和径流数据。MRGA与流域水分指数（M）之间的关系表明，MRGA在25 cm的阈值M以下是不敏感的。较高的M导致MRGA呈指数级增加。然后确定了影响MRGA时空变异性的各种因素（如降雨量）。统计分析（如F检验）表明季节性影响很大，春季、夏季和秋季的MRGA分别为34.3%、8.0%和13.6%。MRGA与降雨量、初始土壤含水量和降雨强度的关系在夏季最强，其次是秋季，然后是春季。

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

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques 环境科学-水资源

CiteScore

6.60

自引率

11.40%

发文量

144

审稿时长

9.8 months

期刊介绍： Hydrological Sciences Journal is an international journal focused on hydrology and the relationship of water to atmospheric processes and climate. Hydrological Sciences Journal is the official journal of the International Association of Hydrological Sciences (IAHS). Hydrological Sciences Journal aims to provide a forum for original papers and for the exchange of information and views on significant developments in hydrology worldwide on subjects including: Hydrological cycle and processes Surface water Groundwater Water resource systems and management Geographical factors Earth and atmospheric processes Hydrological extremes and their impact Hydrological Sciences Journal offers a variety of formats for paper submission, including original articles, scientific notes, discussions, and rapid communications.