Small dams/reservoirs site location analysis in a semi-arid region of Mozambique

International Soil and Water Conservation Research

António dos Anjos Luís¹  Pedro Cabral² 

[1] Department of GIS and Regional Planning, Universidade Católica de Moçambique, Beira, Sofala, Mozambique;NOVA Information Management School (NOVA IMS), Universidade Nova de Lisboa, 1070-312, Lisboa, Portugal;

关键词: Water scarcity;    Multi-criteria evaluation;    Geographic information systems;    Remote sensing;    Mozambique;   

DOI  :  

来源: DOAJ

【 摘 要 】

The water crisis is one of the biggest human problems in developing countries, especially in semi-arid regions where it can form an obstacle to irrigation and cultivation, cattle raising and people’s survival. The construction of small dams/reservoirs are a possible solution to remediate this problem. These infrastructures must be located in suitable areas to be successful. This study aimed to find the most suitable locations for small dams/reservoirs in the Tete province region, Mozambique, which has a pronounced water deficit. A Geographical Information System (GIS) based approach was used to implement a multi-criteria evaluation (MCE) analysis through an Analytic Hierarchical Process (AHP), which included local experts’ consultation. Three main categories of suitability were identified: “Not suitable” (15% of total area), “Modestly suitable” (78%), and “Suitable” (7%). We found that 35 of the 38 (92%) abandoned small dams/reservoirs were in areas classified as “Modestly suitable” confirming the robustness of our model. We also found that most of the dams/reservoirs currently operating (78%) and planned (73%) are in modestly suitable areas.This finding suggests that the decision to construct dams/reservoirs may not have considered the most critical suitability factors identified in this study. More data and/or additional criteria are required for the full understanding of finding out why so many dams/reservoirs failed before building new ones to address the population’s water needs in the region.

【 授权许可】

Unknown