Modelling the Status of Land Degradation Neutrality, Ecosystem Service Value and Sediment Export of Rib Watershed, Upper Blue Nile Basin, Ethiopia.

Melkamu, Alebachew

dc.contributor.author	Melkamu, Alebachew
dc.date.accessioned	2025-07-28T07:56:26Z
dc.date.available	2025-07-28T07:56:26Z
dc.date.issued	2024-07
dc.identifier.uri	http://ir.bdu.edu.et/handle/123456789/16789
dc.description.abstract	his study was targeted on Modelling the Status of Land Degradation Neutrality, Ecosystem Service Value and Sediment Export of Rib Watershed, Upper Blue Nile Basin, Ethiopia. between 2000 and 2020 years. The study employed, primary and secondary data including satellite images, soil maps, climatic data, and soil samples. The status of Land Degradation Neutrality (LDN) was assessed by integrating the three indicators (Land use land cover, Net primary product, and Soil organic carbon) and by employing one out all out framework. Images including Landsat 5 TM for 2000 and 2010, and Landsat 8 OLI_TIRS for 2020 years were classified by using supervised classification technique with a Maximum Likelihood Algorithm (MLA) in ERDAS Imagine 2014. The results showed that there was a net loss in cultivated land (123,977 ha), forest land (5623 ha), shrub lands (13984 ha), grass land (11,999 ha), water bodies (1056 ha) and settlement (1993 ha) from 2000 to 2020. The LDN status in the Rib River Watershed was in a net loss condition for the past two decades. The study also estimated the changes in ESVs and sediment export using the modified ecosystem service value coefficients and the Integrated Valuation of Ecosystem Services Tradeoff (InVEST) model respectively. The total ESVs of the watershed were estimated to be US$ 68.6 million in 2000, US$ 59.4 million in 2010, and US$ 59.3 million in 2020. The ESVs lost between the 2000 and 2020 years in the study watershed were approximately US$ 9.3 million (13.5%). Similarly, the sediment export increased from 6.54 t/ha/year to 11.05 t/ha/year in 2000 and 2020, respectively, and the average soil loss raised from 22.37 t/ha/year in 2000 to 33.38 t/ha/year in 2020. The highest rate of soil erosion was observed on cultivated land, which was increased from 40.86 t/ha/year in 2000 to 53.90 t/ha/year in 2020. The soil loss and sediment export rates in sub-watersheds three (SW-3) and five (SW-5) were the highest, accordingly 61.80 and 18.75 t/ha/year for SW-3 and 63.48 and 19.35 t/ha/year for SW-5. The least amount of soil loss occurs in sub-watershed twelve (SW-12) (2.56 t/ha/year). This is because SW-12 is situated in the lower parts of the watershed that experience less erosion. The result concluded that land managers and policymakers can use the status of LDN, ESVs, and sediment export together during decision-making processes.	en_US
dc.language.iso	en_US	en_US
dc.subject	Geography and Environmental Studies	en_US
dc.title	Modelling the Status of Land Degradation Neutrality, Ecosystem Service Value and Sediment Export of Rib Watershed, Upper Blue Nile Basin, Ethiopia.	en_US
dc.type	Dissartation	en_US