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A study in San Luis, Argentina, comparing native dry forests and pastures found that replacing forests with pastures reduces direct precipitation interception and increases surface runoff and potential soil-level evaporation. These changes suggest a reduction in transpirable precipitation and a higher risk of water erosion.

The report analyzes the hydrological impacts of forest fires and deforestation in the Chiquitania region of Bolivia, specifically focusing on the Curichi Grande and Tucavaca watersheds. It details the development of a multi-criteria prioritization tool using Google Earth Engine (GEE) and a hydrological model using WEAP to assess water availability and soil retention. Field findings from 2021-2022 highlight critical water scarcity and quality issues in local communities following the 2019 and 2020 fires, while the report argues that integrating fire risk into water management is essential for sustainable regional development.

The lower Winnipeg River basin (LWRB) is characterized by a mean annual discharge of 1,008 ± 294 m3/s at the Pine Falls Generating system, with peaks typically occurring in June and July. The river is a critical contributor to Lake Winnipeg, accounting for 49% of the mean monthly discharge of all rivers and streams entering the lake and providing the largest volume of water to it. Six run-of-river hydroelectric stations in the LWRB generate 583 MW of electrical capacity, representing approximately 10% of Manitoba's energy needs. Climate projections for the 2050s suggest a 6.9% increase in mean annual precipitation and a 3.3% increase in runoff, which may impact downstream nutrient loading. While water levels at most hydrometric stations remain relatively constant, Nutimik Lake shows seasonal trends.

The document analyzes the widespread eutrophication of Uruguay's aquatic ecosystems, identifying agricultural intensification as the primary driver of nutrient pollution, particularly phosphorus. It details how climate change exacerbates these symptoms and describes the public health risks posed by toxic cyanobacterial blooms, such as those from the Microcystis aeruginosa complex. The authors argue that current soil conservation practices, like no-till farming, may inadvertently increase soluble phosphorus runoff. They recommend a transition toward neutral or negative phosphorus balances, the use of catch crops, and a shift from a centralized to a decentralized, multi-actor water governance model to effectively mitigate the crisis.

The report identifies Strategic Water Source Areas (SWSAs) as critical land areas that provide a disproportionate amount of surface water runoff or groundwater recharge, sustaining over 50% of South Africa's population and 64% of its economy. It establishes a management framework to mitigate impacts from forestry, agriculture, mining, and invasive alien plants, while providing guidelines for government planners to integrate SWSA maps into strategic development frameworks and zoning schemes.

The report details the ecological and physical vulnerability of the Central Tian Shan in the Kyrgyz Republic. It finds a general trend of glacier retreat and shrinking lakes, which threatens the region's role as the 'water tower of Central Asia' and impacts hydropower security. Biodiversity is at risk, particularly the endangered snow leopard, due to habitat shifts and prey instability, although some species have expanded their range. Future scenarios project significant temperature increases and a long-term decrease in surface runoff by 2100. The document advocates for the expansion of protected areas and the implementation of climate-smart livelihoods, such as yak breeding and ecotourism, to build community and ecosystem resilience.

The report uses the Soil Water Assessment Tool (SWAT) and a lumped groundwater model to evaluate the Jaldhaka watershed's current hydrology and the effects of shifting land use or increasing groundwater pumping. It finds that while both a deforestation scenario and an electrification scenario increase rice production, deforestation significantly raises flood risks. Electrification increases productivity but may lead to groundwater depletion of up to 8 meters in downstream areas under a 100% adoption scenario, though this may be partially offset by induced recharge from perennial rivers.