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The report finds that by mid-century, between USD 300 million and almost USD 1 billion in annual soy trade bound for Europe could be exposed to disruption due to critically low river levels at the ports of Manaus and Santarém. This risk is driven by a combination of climate change and Amazon deforestation, which reduces rainfall and moisture cycling. The analysis highlights that major commodity traders like Cargill, Amaggi, and Bunge face significant financial exposure, and that EU importers are particularly vulnerable given their reliance on Brazilian soy for livestock feed. The document argues that protecting the Amazon forest is essential for maintaining the physical river infrastructure that compliant, deforestation-free supply chains depend on.

The report details a spatial targeting strategy for phosphorus reduction in the Canadian Prairies, using the Swan Lake study area as a pilot. It integrates the PTMApp model with HEC-HMS and HEC-RAS to account for regional hydrological specifics, such as spring runoff and non-contributing areas. Key findings highlight that default PTMApp settings may overestimate BMP efficiency during spring runoff and that high-quality land-use data is critical to avoid significant errors in nutrient load estimates. The report also discusses the practical application of these models for government and First Nations stakeholders, emphasizing the value of local knowledge and the need for compensation programs to encourage BMP adoption on high-value cropland.

The project analyzes the connection between inland watersheds and coastal ecosystems in several Caribbean island nations. It utilizes hydrological modeling of 84 catchments to assess how land-cover, soil, and human activities—such as urban wastewater discharge in Puerto Rico and deforestation in the Dominican Republic—affect water quality and coastal resources.

The document describes the use of a WEAP model and a 36-year remote sensing dataset (1984–2020) to analyze bofedales wetlands in Bolivia's Katari watershed. It identifies that while glacier retreat in the Cordillera Real is evident, bofedales currently show a greening trend potentially due to increased meltwater and higher temperatures, though long-term decline is expected as aquifer recharge drops. The study also notes that human activities, including overgrazing and mining-related groundwater extraction, are deteriorating wetland health.

The project focuses on the Katari watershed in Bolivia, where high-altitude wetlands known as "bofedales" are critical for regulating water balance and supplying drinking water to La Paz and El Alto. These ecosystems are currently deteriorating due to climate change, glacier retreat, rapid urbanization, overgrazing, and mining-related groundwater extraction. To address this, the Stockholm Environment Institute (SEI) is using multi-temporal remote sensing data from 1984-2020 and the WEAP modelling platform to establish eco-hydrological baselines and evaluate potential conflicts between urban water demands and the preservation of these wetlands.

The document outlines a methodology employed by the Stockholm Environment Institute (SEI) to bridge the gap between global climate models and local water resource planning. Because General Circulation Models (GCMs) from the CMIP5 project lack the spatial resolution (40–120km) necessary for local hydrological assessment, SEI uses the k-NN statistical downscaling method. This process involves selecting high-performing GCMs based on eight climate attributes and using them to create synthetic daily series for temperature and precipitation from 2020 to 2100. These series are then integrated into the Water Evaluation and Planning (WEAP) system to explore robust adaptation alternatives for water service providers and environmental agencies.

The study addresses the lack of hydrological monitoring in the tributaries of Cambodia's Tonle Sap Lake, which contribute 25–30% of the annual flow and are critical for maintaining dry-season lake levels. It aims to simulate baseline flows and project future climate change impacts across 11 sub-basins to support water resource management in a country where 80% of the population depends on agriculture.

The report evaluates the hydrological impact of climate change on the Lake Bunyonyi catchment within the Ruhezamyenda catchment in southwestern Uganda. Using the COSERO hydrological model and CMIP5 global climate model ensembles under RCP4.5 and RCP8.5 scenarios, the study projects increases in temperature, precipitation, and evapotranspiration for the mid-term (20412070) and far future (20712100). While runoff trends show significant uncertainty, there is a general trend toward increasing runoff, particularly in the far future under RCP8.5. The report identifies 'no-regrets' adaptation options focusing on governance, land management, and data collection to address risks such as soil erosion, landslides, and wetland degradation.

The document explains the requirements of California's Sustainable Groundwater Management Act (SGMA), detailing the components of Groundwater Sustainability Plans (GSPs) and the role of Groundwater Sustainability Agencies (GSAs). It identifies six 'undesirable results' that plans must avoid, such as land subsidence and seawater intrusion, and explains the technical tools used to manage these, including water budgets and hydrologic models. The guide emphasizes the subjective nature of 'sustainability' and provides a framework for stakeholders to engage in the planning process, set minimum thresholds, and collaborate with technical experts to ensure plans reflect community values.

The document explains the framework of California's Sustainable Groundwater Management Act (SGMA), which requires local Groundwater Sustainability Agencies (GSAs) to achieve groundwater sustainability by 2040 (or 2042 for low-priority basins). It details the four main components of a Groundwater Sustainability Plan (GSP): basin description, sustainable goals to avoid six 'undesirable outcomes', management projects, and monitoring plans. The guide emphasizes that sustainability is a social and technical definition determined by local community values. It provides a framework for understanding water budgets and hydrological models, stressing the need for open-source software and the integration of community values into technical data. Finally, it outlines pathways for public engagement, such as joining GSA boards or advisory committees, and lists critical questions to ensure transparency and accountability in the planning process.

The FCFA Zambia pilot study found that climate information is not currently used for long-term planning or infrastructure decisions in Zambia. While there is high demand for high-resolution projections, decision-makers often overlook the associated uncertainty. The brief recommends investing in 'adaptation ready' science, creating institutional incentives for collaboration between scientists and planners, and adopting interactive engagement methods like gamification to build trust and improve data flow. It also advocates for open data systems to break down departmental silos and the implementation of forecast-based financing to trigger early action before climate disasters occur.

The report identifies strategic water source areas (SWSAs) across South Africa, Lesotho, and Swaziland, finding that just 8% of the land surface area generates 50% of the region's mean annual runoff. It assesses the land cover and protection status of these areas, noting that while 63% of SWSAs in South Africa remain in a natural condition, only 16% have formal legal protection. The document highlights threats from plantation forestry, cultivation, and mining, specifically noting that over 70% of SWSAs in Mpumalanga are under mining or prospecting licenses.

The report examines the vulnerability of La Mare de Tabalak, a Ramsar site in Niger's Tahoua region, to climate hazards, specifically recurring droughts and occasional floods. Using hydrological modelling (SWAT) and field surveys, the study finds that while the pond is vital for agrosilvopastoral activities, it is threatened by silting, invasive species, and high population pressure. It recommends improving intercommunal governance, establishing continuous environmental monitoring, and accelerating restoration efforts to ensure the wetland's sustainability.

The document identifies a significant gap between climate research and practical application in Asia, noting that while national-level knowledge exists in some countries, sub-national and local levels suffer from severe data and capacity deficits. It highlights systemic barriers such as language, technical framing of research, and the underrepresentation of local traditional knowledge. The brief argues for a collaborative approach that integrates capacity-building with research, utilizes scenario-based analysis to manage uncertainty, and prioritizes the translation of technical data into local languages and simplified formats to support practitioners and policy-makers.

The Caribbean Coastal Scenarios (CCS) project models the flow of water, sediments, and contaminants from inland watersheds to coastal ecosystems in several Caribbean island nations. Initial findings highlight the degradation of water quality due to dams, sewage, and deforestation, specifically noting wastewater treatment gaps in Puerto Rico and agricultural runoff in the Dominican Republic.

The study uses the Kestrel-Integrated Hydrological Model and CARIWIG climate data to project river flows in Saint Lucia's Font D’Or catchment. Results from two climate models, Echam5 and HADCM3Q0, generally predict a decrease in surface water availability, with the most severe reductions occurring in the HADCM3Q0 scenarios. These decreases, particularly during the rainy season, threaten water supplies for the tourism and agriculture sectors.

The briefing describes the 'water-energy-food (WEF) nexus'—defined by quality, quantity, and sustainable access—and how mining operations can threaten these securities through water pollution, land competition, and energy demands. IISD proposes a framework combining participatory approaches, hydrological modelling, and the Driver-Pressure-State-Impact-Response (DPSIR) framework to identify key indicators for monitoring WEF security. This approach is currently being applied to the Maripaston Gold Mine project in Suriname to safeguard the livelihoods of indigenous and maroon communities.

The AHM Project (2012-2017) implemented a climate-smart approach to conservation across 10 demonstration sites in six Asian countries. Key achievements include bringing 2.6 million hectares of land under improved management, benefiting 19,000 people through conflict mitigation with snow leopards, and developing climate-smart landscape and watershed management plans to support the Global Snow Leopard and Ecosystem Protection Program (GSLEP).