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Analysing the relationship between drought and soil erosion using vegetation health index and RUSLE models in Godavari middle sub-basin, India
| Title: | Analysing the relationship between drought and soil erosion using vegetation health index and RUSLE models in Godavari middle sub-basin, India |
| Authors: | Masroor, Md Browse this author | | Sajjad, Haroon Browse this author | | Rehman, Sufia Browse this author | | Singh, Roshani Browse this author | | Rahaman, Md Hibjur Browse this author | | Sahana, Mehebub Browse this author | | Ahmed, Raihan Browse this author | | Avtar, Ram Browse this author →KAKEN DB |
| Keywords: | Drought vulnerability | | Soil erosion | | RUSLE | | Vegetation Health Index (VHI) | | Godavari middle sub-basin |
| Issue Date: | Mar-2022 |
| Publisher: | China University of Geosciences, Beijing |
| Journal Title: | Geoscience Frontiers |
| Volume: | 13 |
| Issue: | 2 |
| Start Page: | 101312 |
| Publisher DOI: | 10.1016/j.gsf.2021.101312 |
| Abstract: | Drought is a natural phenomenon posing severe implications for soil, groundwater and agricultural yield. It has been recognized as one of the most pervasive global change drivers to affect the soil. Soil being a weakly renewable resource takes a long time to form, but it takes no time to degrade. However, the response of soil to drought conditions as soil loss is not manifested in the existing literature. Thus, this study makes a concerted effort to analyze the relationship between drought conditions and soil erosion in the middle sub-basin of the Godavari River in India. MODIS remote sensing data was utilized for driving drought indices during 2000-2019. Firstly, we constricted Temperature condition index (TCI) and Vegetation Condition Index (VCI) from Land Surface Temperature (LST) and Enhanced Vegetation Index (EVI) derived from MODIS data. TCI and VCI were then integrated to determine the Vegetation Health Index (VHI). Revised Universal Soil Loss Equation (RUSLE) was utilized for estimating soil loss. The relationship between drought condition and vegetation was ascertained using the Pearson correlation. Most of the northern and southern watersheds experienced severe drought condition in the sub-basin during 2000-2019. The mean frequency of the drought occurrence was 7.95 months. The average soil erosion in the sub-basin was estimated to be 9.88 t ha (1) year (1). A positive relationship was observed between drought indices and soil erosion values (r value being 0.35). However, wide variations were observed in the distribution of spatial correlation. Among various factors, the slope length and steepness were found to be the main drivers of soil erosion in the sub-basin. Thus, the study calls for policy measures to lessen the impact of drought and soil erosion. (C) 2021 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/85353 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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