| 来源类型 | Journal Article |
| 规范类型 | 其他 |
| Why is the Arkavathy River drying? A multiple-hypothesis approach in a data-scarce region., | |
| Srinivasan, V., S. Thompson, K. Madhyastha, G. Penny, K. Jeremiah, and S. Lele. | |
| 发表日期 | 2015 |
| 出处 | Hydrol. Earth Syst. Sci., 19, 1905-1917, doi:10.5194/hess-19-1905-2015. |
| 出版年 | 2015 |
| 语种 | 英语 |
| 摘要 | Water planning decisions are only as good asour ability to explain historical trends and make reasonablepredictions of future water availability. But predicting wa-ter availability can be a challenge in rapidly growing re-gions, where human modifications of land and waterscapesare changing the hydrologic system. Yet, many regions ofthe world lack the long-term hydrologic monitoring recordsneeded to understand past changes and predict future trends.We investigated this “predictions under change” problemin the data-scarce Thippagondanahalli (TG Halli) catchmentof the Arkavathy sub-basin in southern India. Inflows intoTG Halli reservoir have declined sharply since the 1970s.The causes of the drying are poorly understood, resulting inmisdirected or counter-productive management responses.Five plausible hypotheses that could explain the declinewere tested using data from field surveys and secondarysources: (1) changes in rainfall amount, seasonality and in-tensity; (2) increases in temperature; (3) groundwater ex-traction; (4) expansion of eucalyptus plantations; and (5)fragmentation of the river channel. Our results suggest thatgroundwater pumping, expansion of eucalyptus plantationsand, to a lesser extent, channel fragmentation are much morelikely to have caused the decline in surface flows in the TGHalli catchment than changing climate.The multiple-hypothesis approach presents a systematicway to quantify the relative contributions of proximate an-thropogenic and climate drivers to hydrological change. Theapproach not only makes a meaningful contribution to thepolicy debate but also helps prioritize and design future re-search. The approach is a first step to conducting use-inspiredsocio-hydrologic research in a watershed. |
| 主题 | Water, Land & ; Society |
| URL | https://www.atree.org/node/105 |
| 来源智库 | Ashoka Trust for Research in Ecology and the Environment (India) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/85710 |
| 推荐引用方式 GB/T 7714 | Srinivasan, V., S. Thompson, K. Madhyastha, G. Penny, K. Jeremiah, and S. Lele.. Why is the Arkavathy River drying? A multiple-hypothesis approach in a data-scarce region.,. 2015. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| hess-19-1905-2015.pd（1679KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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