Do vegetation changes necessarily intensify hydrological shifts under multiyear droughts?

H. Weligamage, K. Fowler, M. Saft, D. Ryu, T. Peterson, M. Peel
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Abstract

: Recent observations suggest annual runoff can undergo prolonged shifts, resulting in severe reductions in streamflow generation compared to rainfall generation during and after multiyear droughts. Moreover, these shifts are expected to continue and possibly expand under a future drying climate. Some studies suggest that vegetation may be an important factor driving hydrological shifts under multiyear droughts (Gardiya Weligamage et al., 2023; Peterson et al., 2021). However, this hypothesis is yet to be tested more rigorously over larger areas that experienced rainfall-runoff shifts. Therefore, we investigate how vegetation responded to the Millennium Drought (from 1997 – 2009) in Victoria, Australia at different spatial scales and its relationship with hydrological changes. The
在多年干旱下,植被变化一定会加剧水文变化吗?
最近的观测表明,年径流可能经历长时间的变化,导致在多年干旱期间和之后产生的流量与降雨量相比严重减少。此外,这些变化预计将继续,并可能在未来的干燥气候下扩大。一些研究表明,在多年干旱条件下,植被可能是驱动水文变化的重要因素(Gardiya Weligamage等,2023;Peterson et al., 2021)。然而,这一假设还需要在更大的地区进行更严格的测试,这些地区经历了降雨径流的变化。为此,研究了1997 - 2009年澳大利亚维多利亚州不同空间尺度下植被对千年干旱的响应及其与水文变化的关系。的
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