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<p>Water is vital for food security, industry, power generation and economic development countries such as Tanzania. However, currently water assessment methods often do not adequately link water depletion to user groups and the benefits derived from water use. Many catchments in developing countries have few monitoring stations and lack standardized water accounting systems. Limited water flow data remain a major barrier to operational water accounting systems in river and lake basins. Satellite remote sensing (RS) offers valuable hydro-meteorological data for assessing water resources in data scarce regions. This study applies the RS based Water Accounting Plus (WA+) framework in Tanzania to assess water resources in the Wami-Ruvu Basin Water Board (BWB). The results demonstrate the application of the WA+ approach to assess water availability and use from 2016 to 2021. The analysis uses WaPOR and other open-source global datasets. The result show that the average gross inflow into the basin was 78.6&#xa0;km³/year, entirely from rainfall. Total outflow was 54.2&#xa0;km³/year, leaving a difference of 24.4&#xa0;km³/year between inflow and outflow. This indicates an increase in basin water storage over study period. This finding is consistent with GRACE derived water storage trends, which showed increasing water storage from 2002 to 2022. The study demonstrates that standardized water accounting can be achieved in data scarce basins using RS-based WA+ procedure. The findings can support informed decision-making, improve water resource management and sustainable conservation.</p>

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Enhancing Water Resource Management in Data-Scarce Regions using the WA+ Framework

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Dorothea Deus,
  • George Venance Lugomela

摘要

Water is vital for food security, industry, power generation and economic development countries such as Tanzania. However, currently water assessment methods often do not adequately link water depletion to user groups and the benefits derived from water use. Many catchments in developing countries have few monitoring stations and lack standardized water accounting systems. Limited water flow data remain a major barrier to operational water accounting systems in river and lake basins. Satellite remote sensing (RS) offers valuable hydro-meteorological data for assessing water resources in data scarce regions. This study applies the RS based Water Accounting Plus (WA+) framework in Tanzania to assess water resources in the Wami-Ruvu Basin Water Board (BWB). The results demonstrate the application of the WA+ approach to assess water availability and use from 2016 to 2021. The analysis uses WaPOR and other open-source global datasets. The result show that the average gross inflow into the basin was 78.6 km³/year, entirely from rainfall. Total outflow was 54.2 km³/year, leaving a difference of 24.4 km³/year between inflow and outflow. This indicates an increase in basin water storage over study period. This finding is consistent with GRACE derived water storage trends, which showed increasing water storage from 2002 to 2022. The study demonstrates that standardized water accounting can be achieved in data scarce basins using RS-based WA+ procedure. The findings can support informed decision-making, improve water resource management and sustainable conservation.