Analysis of land degradation trends and driving factors in Ethiopia based on NPP-WUE
Received date: 2022-05-07
Revised date: 2022-06-26
Online published: 2023-01-17
Land degradation has an important impact on mitigation and adaptation to climate change， which threatens the sustainable development of the world， causing a series of social， economic， and ecological problems. Land degradation is also one of the biggest challenges facing the world at present. Based on the NDVI， meteorological data， and land cover data of Ethiopia from 2001 to 2020， this study calculated NPP and WUE by CASA model， and used Sen+MK trend method to get the trend of land degradation and restoration. Finally， we analyzed the driving factors of land degradation and restoration by multiple stepwise regression method. The results show that the land degradation in Ethiopia showed a recovery trend from 2001 to 2020， and the area in the recovery period accounts for 34.51% of the national area， mainly distributed Western Ethiopia and The Somari State； while， the degraded area only accounts for 1.63% and mainly distributed Addis Abab. The main driving factors of land degradation and restoration are human and climate combined or human single factors. Furthermore， it is found that the primary factors of degradation in the study area are rapid population growth and urban expansion. Land restoration is related to the forest landscape restoration and sustainable land management measures implemented in the past 20 years. The results of this study could help Ethiopia continuously implement strict land governance policies and prevent the hazards caused by land degradation.
Key words： Ethiopia; land degradation; driving factors; NPP; WUE
Shilin Fu , Jiaqiang Lei , Yiqi Zhou , Na Zhou , Malicha Loje Hare , Zinabu Bora Jorro . Analysis of land degradation trends and driving factors in Ethiopia based on NPP-WUE[J]. Journal of Desert Research, 2023 , 43(1) : 128 -141 . DOI: 10.7522/j.issn.1000-694X.2022.00074
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