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The Asia-Pacific region is extremely vulnerable to climate variability and change. This reflects high exposure to hydroclimatic hazards such as tropical cyclones, floods, droughts, and heatwaves. Rapidly growing cities and low-lying coastal zones/estuaries also face threats from sea level rise and storm surges. However, climate model projections remain very uncertain about most of these risks, so water infrastructure and operations need to consider a range of plausible futures. Against this background, the Asian Development Bank (ADB) has been developing frameworks, tools, and capacities in climate risk and adaptation assessment and management. Project teams are often operating in data-scarce situations and under significant time constraints, so the emphasis has been on creating pragmatic guidance and training resources. This paper charts the transition of climate risk management (CRM) within the ADB from a predominantly scenario-led to decision-led approach to adaptation. Examples are given of light-touch procedures for screening climate risks, strengthening the transparency and rigour of scenario analysis, raising awareness of a broad range of adaptation options, streamlining identification of CRM options, and embedding allowances for climate change in detailed engineering designs. Such practical innovations would benefit communities of practice beyond the Asia-Pacific region. [ABSTRACT FROM AUTHOR]

This paper sets forth a framework to describe the science-policy interface. The "sedimentation-upwelling model" is a two-pan process through which scientific information gradually becomes part of resource managers' and policymakers' agendas. In this paper, sedimentation refers to a gradual process through which scientific information slowly permeates a policymaking body, often slowly and through multiple sources. Upwelling is a process by which policymakers, having become aware of scientific concepts in a general way though sedimentation, independently devise policy actions consistent with the scientific body of knowledge. The framework was tested in the case of climate change science and California water policy through an analysis of historical data and interviews with key players on the science and policy sides of this issue. A remarkably consistent scientific message over the course of fifteen years before 2003 was not followed by corresponding changes in water management, as a "linear model" in which policymakers act directly on scientists recommendations would predict. Instead, both sedimentation and upwelling operated in this case and the importance of the linear pathway was minimal. Viewing science in the context of the upwelling-sedimentation model does not imply that science is ultimately any less influential on policy. On the contrary, this work suggests that policymakers rely on general, widespread cues that come both directly from scientists and through intermediaries and that these cues can influence policy choices in important, but often indirect ways. [ABSTRACT FROM AUTHOR]

China is facing many challenges in the water sector while implementing integrated water resources management (IWRM). Another daunting task -- adapting to water-related impacts of climate change, is also challenging China's water managers. These challenges have been posing threats to China's economic, social and environmental development. While separate efforts in promoting IWRM and climate change adaptation have been made, the approach of mainstreaming climate change adaptation strategy within IWRM is seldom studied. Attempting to fill the gap, this paper argues that there is great potential in synergizing them after analysing their distinctions and common points. By developing climate-proofing strategies within IWRM, mainstreaming is able to minimize adverse water-related climate change risks and maximize the benefits of policies and plans. In this study, entry points of mainstreaming climate change adaptation in the sustaining environment of IWRM and its process will be identified and analysed. [ABSTRACT FROM AUTHOR]

Climate change is one of the drivers of change in the Ganges River Basin, together with population growth, economic development and water management practices. These changing circumstances have a significant impact on key social and economic sectors of the basin, largely through changes in water quantity, quality and timing of availability. This paper evaluates the impact of water on changing circumstances in three sectors of the Ganges Basin - agriculture, ecosystems and energy. Given the inherent interconnectedness of these core sectors and the cross-cutting impact of changing circumstances on water resources, we argue that adaptation should not be viewed as a separate initiative, but rather as a goal and perspective incorporated into every level of planning and decision making. Adaptation to changing circumstances will need to be closely linked to water resource management and will require significant collaboration across the sectors. [ABSTRACT FROM AUTHOR]