Analysis of land degradation trends and driving factors in Ethiopia based on NPP-WUE

doi:10.7522/j.issn.1000-694X.2022.00074

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (1): 128-141.DOI: 10.7522/j.issn.1000-694X.2022.00074

Analysis of land degradation trends and driving factors in Ethiopia based on NPP-WUE

Shilin Fu¹^,²^,³(), Jiaqiang Lei¹^,²^,³, Yiqi Zhou¹^,³, Na Zhou¹^,²^,³(), Malicha Loje Hare⁴, Zinabu Bora Jorro⁴

^1.State Key Laboratory of Desert and Oasis Ecology /, Xinjiang Institute of Ecology and Geography，Chinese Academy of Sciences，Urumqi 830011，China
^2.National Engineering Research Center for Desert-Oasis Ecological Construction, Xinjiang Institute of Ecology and Geography，Chinese Academy of Sciences，Urumqi 830011，China
^3.University of Chinese Academy of Sciences，Beijing 100049，China
^4.Oromia Pastoral Area Development Commission，Oromia 00720，Ethiopia

Received:2022-05-07 Revised:2022-06-26 Online:2023-01-20 Published:2023-01-17
Contact: Na Zhou

Abstract

Abstract:

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

CLC Number:

F301.2

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.

Figures/Tables 15

References 52

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数据	数据来源	空间分辨率/m	时段
土地覆盖	ESA CCI	300	2001—2020年
NDVI	MODIS（MOD13A1）	500	2001—2020年
潜在蒸散发	TerraClimate	4 638.3	2001—2020年
太阳总辐射	TerraClimate	4 638.3	2001—2020年
蒸散	TerraClimate	4 638.3	2001—2020年
降水	TerraClimate	4 638.3	2001—2020年
地表温度	MODIS（MOD11A1）	1 000	2001—2020年

数据	数据来源	空间分辨率/m	时段
土地覆盖	ESA CCI	300	2001—2020年
NDVI	MODIS（MOD13A1）	500	2001—2020年
潜在蒸散发	TerraClimate	4 638.3	2001—2020年
太阳总辐射	TerraClimate	4 638.3	2001—2020年
蒸散	TerraClimate	4 638.3	2001—2020年
降水	TerraClimate	4 638.3	2001—2020年
地表温度	MODIS（MOD11A1）	1 000	2001—2020年

NPP趋势	WUE趋势	退化和恢复阶段
下降	上升	退化早期阶段
下降	不变	退化中期阶段
下降	下降	退化后期阶段
上升	上升	恢复早期阶段
上升	不变	恢复中期阶段
上升	下降	恢复后期阶段

NPP趋势	WUE趋势	退化和恢复阶段
下降	上升	退化早期阶段
下降	不变	退化中期阶段
下降	下降	退化后期阶段
上升	上升	恢复早期阶段
上升	不变	恢复中期阶段
上升	下降	恢复后期阶段

地区	退化占比/%				恢复占比/%
地区	退化早期	退化中期	退化后期	总和	恢复早期	恢复中期	恢复后期	总和
埃塞俄比亚	0.005	0.992	0.634	1.632	14.242	20.123	0.146	34.510
亚的斯亚贝巴	0.000	30.392	16.355	46.747	1.159	0.045	0.000	1.203
阿法尔州	0.061	6.523	0.417	7.001	3.813	4.002	0.000	7.816
阿姆哈拉州	0.000	0.751	0.333	1.085	19.101	8.827	0.000	27.928
本尚古勒-古马兹州	0.000	0.499	0.922	1.421	55.126	4.744	0.000	59.869
德雷达瓦	0.000	0.233	0.512	0.745	0.978	4.682	0.000	5.660
甘贝拉州	0.000	0.342	0.287	0.629	84.741	0.372	0.000	85.113
哈勒尔州	0.000	0.330	0.132	0.463	12.426	7.865	0.000	20.291
奥罗米亚州	0.000	0.678	1.158	1.836	11.459	12.410	0.235	24.104
索马里州	0.000	0.119	0.021	0.140	2.944	47.316	0.283	50.544
南方各族州	0.000	0.333	1.349	1.682	22.617	8.506	0.000	31.123
提格里州	0.000	0.405	0.578	0.983	13.322	18.602	0.000	31.925

Analysis of land degradation trends and driving factors in Ethiopia based on NPP-WUE

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