Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR029888 |
Bedrock Groundwater Catchment Area Unveils Rainfall-Runoff Processes in Headwater Basins | |
N. Masaoka; K. Kosugi; M. Fujimoto | |
2021-09-04 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | Bedrock groundwater (BGW) has a contribution area that differs from that of the surface watershed. To date, there has been no analysis using BGW observations to determine to what extent the BGW catchment area influences surface runoff characteristics. This study determined the BGW catchment area from the water table, using densely nested boring wells (61 in bedrock and three in the soil layer) drilled in the granitic basin (2.3 ha). Streamflow runoff was also measured concurrently across the entire watershed (F0) and the subwatersheds (F1 to F6). The BGW catchment area of F3 accounted for 191% of the watershed area derived from surface topography, reducing the area of adjacent watersheds through cross-watershed flow. The annual precipitation input to the BGW catchment area and baseflow volume was highly correlated, indicating that the BGW catchment area reflected the actual catchment effect in the bedrock layer more accurately than the surface watershed area. The degree of bedrock weathering showed that the BGW table was distributed along the boundary of the CL–CM classes. The estimated actual permeability of the CM class bedrock based on the deep percolation rate suggests that the depth near the CL–CM boundary is the hydrological basement surface; this defines the BGW catchment area. This study demonstrates that the BGW catchment area concept provides an accurate prediction of streamflow runoff in mountainous headwater basins that are heavily governed by hydrological processes in bedrock. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/337531 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | N. Masaoka,K. Kosugi,M. Fujimoto. Bedrock Groundwater Catchment Area Unveils Rainfall-Runoff Processes in Headwater Basins[J]. Water Resources Research,2021. |
APA | N. Masaoka,K. Kosugi,&M. Fujimoto.(2021).Bedrock Groundwater Catchment Area Unveils Rainfall-Runoff Processes in Headwater Basins.Water Resources Research. |
MLA | N. Masaoka,et al."Bedrock Groundwater Catchment Area Unveils Rainfall-Runoff Processes in Headwater Basins".Water Resources Research (2021). |
条目包含的文件 | 条目无相关文件。 |
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