Impact of Drought on Land Productivity and Degradation in the Brazilian Semiarid Region

نویسندگان

چکیده

The Brazilian semiarid region (BSR) has faced severe drought over the last three decades, which led to a significant decline in land productivity, posing considerable threat food security and local economy communities. United Nations Convention Combat Desertification (UNCCD) proposed use of Earth observation-derived vegetation indices for monitoring degradation across regions. In this study, we aim evaluate comprehensive UNCCD-recommended productivity dynamic (LPD) approaches BSR by utilizing standardized precipitation–evapotranspiration index (SPEI) at 12-month time scales as benchmark obtained from ground-based measurements. Our findings indicate that LPD methods residual trends analysis (RESTREND), Trends.Earth (TE), Food Agricultural Organization’s World Overview Conservation Approaches Technologies (FAO-WOCAT) are best suited identifying degraded areas compared other approaches. However, it is advisable these with caution, since they do not fully capture impact on may result underestimating extent areas. RESTREND-based LPD, TE, FAO-WOCAT estimate reached 213,248 km2, 248,075 246,783 km2 land, respectively, between 2001 2015. These be valuable decision-makers involved management conservation efforts Sertão Brazil.

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ژورنال

عنوان ژورنال: Land

سال: 2023

ISSN: ['2073-445X']

DOI: https://doi.org/10.3390/land12050954