Water Resource Management in Semi-Arid Environments

Water resource management in semi-arid regions addresses the challenge of securing reliable water supplies amid highly variable rainfall, high evapotranspiration rates and growing demand. Traditional strategies such as rainwater harvesting, small reservoir networks and soil moisture conservation remain fundamental, while modern approaches leverage remote sensing, data-driven modelling and managed aquifer recharge to enhance resilience. Integrated catchment management balances surface storage and groundwater use, optimises allocation among domestic, agricultural and ecological needs and anticipates climate-driven shifts in water availability. Socio-hydrological perspectives emphasise the interactions between human interventions and natural hydrological processes, recognising that small-scale infrastructures can both mitigate local shortages and alter downstream flows. Advances in geospatial analysis enable prioritisation of storage rejuvenation and targeted investment, while process-based and statistical forecasting tools support seasonal planning. Effective governance frameworks integrate participatory water allocation, adaptive policy and cross-sectoral coordination to sustain livelihoods and ecosystem services under intensifying drought pressures.

Research from Nature Portfolio

Recent studies have combined machine learning with satellite observations to refine estimates of evapotranspiration and soil moisture dynamics across dryland catchments, revealing spatial patterns of water loss at sub-kilometre scales and informing tailored irrigation schedules. A data-driven framework for managed aquifer recharge has demonstrated how targeted infiltration basins can bolster groundwater reserves by up to 20 % during wet seasons, offsetting surface-water deficits in subsequent dry spells. These advances underscore the value of coupling high-resolution remote sensing with process-based recharge models to optimise the siting and operation of recharge infrastructure in semi-arid plains.

Water Resource Management in Semi-Arid Environments publication trend

The graph below shows the total number of articles in water resource management in semi-arid environments across all publications each year (not limited to Nature Index journals).

Technical terms

Evapotranspiration: Combined process by which water is transferred from land and vegetation to the atmosphere.

Managed Aquifer Recharge (MAR): Intentional enhancement of groundwater storage through methods such as infiltration basins or injection wells.

Dense Reservoir Network (DRN): High concentration of small water storages within a catchment, often informal and unmonitored.

Hydrological drought: Phase of water deficiency characterised by reduced streamflow and depleted surface and subsurface storage.

References

1. Optimising water storage for climate resilience: Geospatial targeting for small tanks rejuvenation in Sri Lanka. Journal of Environmental Management (2025).
2. Modeling the influence of small reservoirs on hydrological drought propagation in space and time. Journal of Hydrology (2024).
3. The socioecohydrology of rainwater harvesting in India: understanding water storage and release dynamics across spatial scales. Hydrology and Earth System Sciences (2016).
4. Drought Cycle Analysis to Evaluate the Influence of a Dense Network of Small Reservoirs on Drought Evolution. Water Resources Research (2022).
5. Seasonal drought prediction for semiarid northeast Brazil: what is the added value of a process-based hydrological model?. Hydrology and Earth System Sciences (2019).