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Land-Use and Land-Cover (LULC) Change Detection and the Implications for Coastal Water Resource Management in the Wami–Ruvu Basin, Tanzania

Author

Listed:
  • Jamila Ngondo

    (State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
    Department of Geography and Economics, Dar es Salaam University College of Education, Dar es Salaam 2329, Tanzania)

  • Joseph Mango

    (State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
    Department of Transportation and Geotechnical Engineering, University of Dar es Salaam, Dar es Salaam 35131, Tanzania)

  • Ruiqing Liu

    (State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China)

  • Joel Nobert

    (Department of Water Resources Engineering, University of Dar es Salaam, Dar es Salaam 35131, Tanzania)

  • Alfonse Dubi

    (Department of Transportation and Geotechnical Engineering, University of Dar es Salaam, Dar es Salaam 35131, Tanzania)

  • Heqin Cheng

    (State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China)

Abstract

Evaluation of river basins requires land-use and land-cover (LULC) change detection to determine hydrological and ecological conditions for sustainable use of their resources. This study assessed LULC changes over 28 years (1990–2018) in the Wami–Ruvu Basin, located in Tanzania, Africa. Six pairs of images acquired using Landsat 5 TM and 8 OLI sensors in 1990 and 2018, respectively, were mosaicked into a single composite image of the basin. A supervised classification using the Neural Network classifier and training data was used to create LULC maps for 1990 and 2018, and targeted the following eight classes of agriculture, forest, grassland, bushland, built-up, bare soil, water, and wetland. The results show that over the past three decades, water and wetland areas have decreased by 0.3%, forest areas by 15.4%, and grassland by 6.7%, while agricultural, bushland, bare soil, and the built-up areas have increased by 11.6%, 8.2%, 1.6%, and 0.8%, respectively. LULC transformations were assessed with water discharge, precipitation, and temperature, and the population from 1990 to 2018. The results revealed decreases in precipitation, water discharge by 4130 m 3 , temperature rise by 1 °C, and an increase in population from 5.4 to 10 million. For proper management of water-resources, we propose three strategies for water-use efficiency-techniques, a review legal frameworks, and time-based LULC monitoring. This study provides a reference for water resources sustainability for other countries with basins threatened by LULC changes.

Suggested Citation

  • Jamila Ngondo & Joseph Mango & Ruiqing Liu & Joel Nobert & Alfonse Dubi & Heqin Cheng, 2021. "Land-Use and Land-Cover (LULC) Change Detection and the Implications for Coastal Water Resource Management in the Wami–Ruvu Basin, Tanzania," Sustainability, MDPI, vol. 13(8), pages 1-23, April.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:8:p:4092-:d:531386
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    References listed on IDEAS

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    1. Taingaun Sourn & Sophak Pok & Phanith Chou & Nareth Nut & Dyna Theng & Phanna Rath & Manuel R. Reyes & P.V. Vara Prasad, 2021. "Evaluation of Land Use and Land Cover Change and Its Drivers in Battambang Province, Cambodia from 1998 to 2018," Sustainability, MDPI, vol. 13(20), pages 1-22, October.
    2. Taingaun Sourn & Sophak Pok & Phanith Chou & Nareth Nut & Dyna Theng & P. V. Vara Prasad, 2022. "Assessment of Land Use and Land Cover Changes on Soil Erosion Using Remote Sensing, GIS and RUSLE Model: A Case Study of Battambang Province, Cambodia," Sustainability, MDPI, vol. 14(7), pages 1-24, March.
    3. Herrieth Machiwa & Joseph Mango & Dhritiraj Sengupta & Yunxuan Zhou, 2021. "Using Time-Series Remote Sensing Images in Monitoring the Spatial–Temporal Dynamics of LULC in the Msimbazi Basin, Tanzania," Land, MDPI, vol. 10(11), pages 1-15, October.
    4. Lucas Theodori Ntukey & Linus Kasian Munishi & Edward Kohi & Anna Christina Treydte, 2022. "Land Use/Cover Change Reduces Elephant Habitat Suitability in the Wami Mbiki–Saadani Wildlife Corridor, Tanzania," Land, MDPI, vol. 11(2), pages 1-20, February.

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