Response of the winter soil moisture of different vegetation types to rainfall events in karst slope land

IF 2.7 4区环境科学与生态学 Q2 Environmental Science

Hydrology Research Pub Date : 2022-09-29 DOI:10.2166/nh.2022.033

E. Yuan, Qiuwen Zhou, W. Yan, D. Peng, Yalin Wang

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引用次数: 1

Abstract

Understanding the response of soil moisture of different vegetation types to rainfall in karst regions in winter is significant for implementing various ecological restoration projects. However, at present, the related research is mainly focused on non-winter seasons, and only few research exist on winter seasons. Therefore, in this study, four types of vegetation – grassland, arable land, shrubland, and forestland – were selected as sample plots in the Guanling County of southwestern Guizhou, China. The magnitude, time, and speed responses of soil moisture of the vegetation types to rainfall were calculated using the time-series data of soil moisture of different vegetation types. The results showed that the response of soil moisture differed between different vegetation types in winter and non-winter seasons in karst areas. Among the four vegetation types, soil moisture response magnitude to rainfall in grassland and arable land had a similar distribution pattern along different soil depths, whereas, in scrubland and forestland, it decreased gradually along the soil depth. In addition, compared with other vegetation types, for grassland soil moisture, the response magnitude, response duration, and response speed to rainfall are the largest, longest, and fastest, respectively. Our study used quantitative indices to illustrate the response of soil moisture to rainfall for different vegetation types under a humid climate in a mid-subtropical zone on sloped, pure limestone land. The results of this study provide a scientific basis for the implementation of ecological restoration projects in karst areas.

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喀斯特坡地不同植被类型冬季土壤水分对降雨事件的响应

了解喀斯特地区不同植被类型冬季土壤水分对降雨的响应，对实施各种生态修复工程具有重要意义。但目前相关研究主要集中在非冬季，对冬季的研究较少。因此，本研究在贵州西南部关陵县选取草地、耕地、灌丛和林地4种植被类型作为样地。利用不同植被类型土壤水分时间序列数据，计算不同植被类型土壤水分对降雨的响应幅度、响应时间和响应速度。结果表明，喀斯特地区不同植被类型在冬季和非冬季对土壤水分的响应存在差异。在4种植被类型中，草地和耕地土壤水分对降雨的响应强度沿不同土壤深度的分布格局相似，而灌丛和林地土壤水分对降雨的响应强度沿土壤深度逐渐减小。此外，与其他植被类型相比，草地土壤水分对降雨的响应幅度最大，响应持续时间最长，响应速度最快。本研究利用定量指标分析了中亚热带湿润气候下不同植被类型土壤水分对降雨的响应。研究结果为喀斯特地区生态修复工程的实施提供了科学依据。

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

Hydrology Research Environmental Science-Water Science and Technology

CiteScore

5.30

自引率

7.40%

发文量

审稿时长

17 weeks

期刊介绍： Hydrology Research provides international coverage on all aspects of hydrology in its widest sense, and welcomes the submission of papers from across the subject. While emphasis is placed on studies of the hydrological cycle, the Journal also covers the physics and chemistry of water. Hydrology Research is intended to be a link between basic hydrological research and the practical application of scientific results within the broad field of water management.