Impacts of droughts on rainfall use efficiency in different climatic zones and land uses in Iran
Article
Article Title | Impacts of droughts on rainfall use efficiency in different climatic zones and land uses in Iran |
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ERA Journal ID | 44655 |
Article Category | Article |
Authors | Ahmadaali, Khaled, Damaneh, Hadi Eskandari, Ababaei, Behnam and Damaneh, Hamed Eskandari |
Journal Title | Arabian Journal of Geosciences |
Journal Citation | 14 (2) |
Article Number | 126 |
Number of Pages | 15 |
Year | 2021 |
Publisher | Springer |
Place of Publication | Germany |
ISSN | 1866-7511 |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s12517-020-06389-1 |
Web Address (URL) | https://link.springer.com/article/10.1007/s12517-020-06389-1 |
Abstract | The frequency, duration, and severity of droughts have increased substantially in recent decades, especially in arid and semi-arid regions of the world. Understanding the responses of Rainfall Use Efficiency (RUE) to drought in different ecosystems and climatic zones is not well understood. In this study, spatiotemporal patterns of RUE and Standardized Precipitation Index (SPI) were investigated in four biomes (agriculture, bare land, forest, and range) and eight climatic zones in Iran from 2000 to 2014 using the global MODIS data (MOD17A3) of a 1-km resolution and precipitation data from meteorological stations across the country. A decreasing spatial trend in RUE was observed from west to east and north-west to south-east implying the role of altitude on spatial variation of precipitation. Based on the proposed RUE classification, nearly 60% of Iran’s lands were classified in class “extremely low” and experienced mild droughts during the study period. The increase of drought severity has resulted in an increase in RUE. Temporal variation of national average RUE in all land uses showed a similar trend and the maximum RUE was observed in agricultural lands followed by forest, range, and bare lands. RUE strongly responded to SPI variations across the eight climatic zones and the four biomes. We found significant and negative slopes of linear regression equations for RUE against SPI across all climatic zones, except the arid zone, representing higher accuracy in humid zones than in arid zones. Land uses showed a significant and negative regression, except in agricultural lands. |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 300210. Sustainable agricultural development |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Tehran, Iran |
University of Hormozgan, Iran | |
University of Queensland |
https://research.usq.edu.au/item/z641y/impacts-of-droughts-on-rainfall-use-efficiency-in-different-climatic-zones-and-land-uses-in-iran
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