NDVI和基于chirps的SPI在伊拉克巴士拉省干旱对作物产量影响评估中的比较分析

Q3 Agricultural and Biological Sciences caspian journal of environmental sciences Pub Date : 2021-07-01 DOI:10.22124/CJES.2021.4941
Raheem Attafi, A. D. Boloorani, Ayad M. Fadhil Al-Quraishi, F. Amiraslani
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引用次数: 1

摘要

干旱是一种发生在世界所有气候带的气候现象。它造成环境和经济损失,并可能对农业利润产生负面影响,特别是在干旱和半干旱地区。本研究采用标准化降水指数(SPI)和归一化植被指数(NDVI)模拟干旱对农业生产的影响。同时考虑了气象和水文参数的作用。结果表明:(1)干旱强度增加导致作物产量下降,而在干旱程度较高的情况下,产量保持不变;(2) NDVI可以模拟干旱对作物生产的影响(R2 = 0.60, RMSE = 0.42);(3) NDVI对SPI波动的反映能力较好,但在干旱强度较大时,对SPI波动的敏感性较低;(4)研究区干旱空间格局显示,巴士拉省北部地区对干旱的敏感性最高;(5)长期SPI的时间格局显示干旱对农业活动具有较高的风险;气温和湿度是影响伊拉克巴士拉地区干旱对农业生产影响的主要气象参数
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Comparative analysis of NDVI and CHIRPS-based SPI to assess drought impacts on crop yield in Basrah Governorate, Iraq
Drought is a climatological phenomenon that occurs across all climate zones of the world. It causes environmental and economic loss and can negatively affect agricultural profit, especially in dry and semi-arid areas. This study used the Standardized Precipitation Index (SPI) and Normalized Difference Vegetation Index (NDVI) to model drought impacts on agricultural production. The role of meteorological and hydrological parameters was considered simultaneously. The results revealed that: (1) the increase of drought intensity leads to the reduction of crop production, while in the case of high-level drought, the production stays consistent; (2) NDVI could model the impacts of drought on crops production (R2 = 0.60 and RMSE = 0.42); (3) NDVI had a better ability for showing SPI fluctuations, but in higher drought intensities, it was less sensitive to SPI fluctuations; (4) the spatial pattern of drought in the study area showed that the northern parts of the Basrah Governorate have the highest sensitivity to drought; (5) the temporal pattern of long-term SPI showed a high level of risk for agricultural activities due to drought; and (6) air temperature and humidity are the main meteorological parameters of crops production affecting the interpretation of the impacts of drought on agriculture production in Basrah, Iraq
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来源期刊
caspian journal of environmental sciences
caspian journal of environmental sciences Environmental Science-Environmental Science (all)
CiteScore
2.30
自引率
0.00%
发文量
0
审稿时长
5 weeks
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