The Asian Development Bank (ADB) identified the need for a detailed Climate Risk and Adaptation (CRA) assessment for the DKSHEP to understand the risk posed by the changing climate on hydropower and the environment. Therefore, the objective of this Climate Risk and Adaptation Assessment (CRA) is to assess the vulnerability of the project components to future climate change and recommend adaptation options for climate-proofing of the design. Therefore, this CRA covers both type 2 adaptation, related to system change and resilience building, as well as type 1 adaptation related to climate-proofing This CRA assesses historic trends in relevant climate-related variables and analyses climate projections for the DKSHEP. Based on these projections, an assessment of the current and future climate risks and vulnerabilities relating to the proposed project activities will be outlined. Finally, recommendations will be presented for climate adaptation measures.
Nepal’s freshwater availability and timing are under thread by extreme temperature and precipitation variations, changing monsoon patterns, melting of ice caps and glaciers, and reduced snow cover. Some initial estimated economic cost of climate change in agriculture, hydropower and water induced disasters show a number of up to 2-3% of GDP per year by 2050.
The proposed project aims to improve landscape-scale adaptation and disaster risk management through a set of outputs:
- Climate-smart landscape management practices adopted and enhanced
- Climate-resilient rural livelihoods developed
- Integrated disaster risk reduction and climate change adaptation approaches
- Capacities of local communities, regional and national decision-makers, and institutions on climate change adaptation and disaster risk reduction strengthened
FutureWater developed a so-called “Problem Tree” analysis for the proposed project. A Problem Tree is a helpful tool to understand the relationships between a problem, its causes, and its effects. The trunk of the tree represents the main problem, the roots the causes of the problem, and the branches the direct and indirect effects of the problem.
The project will be further developed as a so-called Climate Change Adaptation Project. More traditional development projects include also climate proofing, but focus is on development investments and adaptation is a secondary objective. Although those development projects contribute to adaptation (by helping the proposed asset or activity being financed to adapt to identified physical climate risks to the asset/activity), the primary objective of such a project is not adaptation. Climate Change Adaptation Projects are intentionally designed to enable climate adaptation of a high-risk topics. This is achieved by supporting outputs and activities that reduce the impacts of current and future expected climate risks and/or address barriers to adaptation, thereby advancing resilience. So this Climate Change Adaptation Project is meant to advance Nepal’s goal on adaptation.
Flooding has always been a major cause of natural disasters in a mountainous country like Nepal. Among the many natural disasters that affect Nepal, the recurring floods during the monsoon season have catastrophic consequences every year. Nepal’s fragile geological conditions and complex topography combined with frequently occurring extreme rainfall during the monsoon poses risks to communities living along the flood plains. In order to ensure good flood management practices and the development of long-term water management strategies a good understanding of key hydrological processes and the ability to simulate future changes in streamflow is a prerequisite.
During recent years, FutureWater has done many projects in collaboration with NGO’s, INGO’s and academic institutions in Nepal. This is the first time FutureWater collaborated with the Institute of Forestry (IOF), Nepal to provide their teaching faculty and researchers a training on “Use of open source platform for hydrological modelling of data sparse regions in Nepal”. The Tailor Made Training (TMT) was fully funded by NUFFIC’s Orange Knowledge Programme (OKP) and took place from 8 April to 24 April 2019 in Pokhara, Nepal.
Essential skills, in particular modelling of hydrological processes are currently lacking at IOF, hampering the capacity to gain deep understanding of the present and future flood management situation in the region. Therewith IOF faces difficulties in developing long-term strategies to deal with climate change impacts for Nepal’s water resources. Further, the lack of ground-based measurements in the Himalayan region imposes an additional level of complexity while modelling the hydrological characteristics of this region. The use of readily available open source satellite-based data can augment the limited ground-based observation in the region.
Overall, the training fulfilled all the needs of the IOF, and was positively evaluated by the participants. This training program has encouraged the faculty members from IOF to use open source data and platforms in their future research and teaching.
The SREB is part of the Belt and Road Initiative, being a development strategy that focuses on connectivity and cooperation between Eurasian countries. Essentially, the SREB includes countries situated on the original Silk Road through Central Asia, West Asia, the Middle East, and Europe. The initiative calls for the integration of the region into a cohesive economic area through building infrastructure, increasing cultural exchanges, and broadening trade. A major part of the SREB traverses Asia’s high-altitude areas, also referred to as the Third Pole or the Asian Water Tower. In the light of the planned development for the SREB traversing the Third Pole and its immediate surroundings, the “Pan-Third Pole Environment study for a Green Silk Road (Pan-TPE)” program will be implemented.
The project will assess the state and fate of water resources in the region under following research themes:
1. Observed and projected Pan-TPE climate change
2. Impacts on the present and future Water Tower of Asia
3. The Green Silk Road and changes in water demand
4. Adaptation for green development
In irrigated agriculture options to save water tend to focus on improved irrigation techniques such as drip and sprinkler irrigation. These irrigation techniques are promoted as legitimate means of increasing water efficiency and “saving water” for other uses (such as domestic use and the environment). However, a growing body of evidence, including a key report by FAO (Perry and Steduto, 2017) shows that in most cases, water “savings” at field scale translate into an increase in water consumption at system and basin scale. Yet despite the growing and irrefutable body of evidence, false “water savings” technologies continue to be promoted, subsidized and implemented as a solution to water scarcity in agriculture.
The goal is to stop false “water savings” technologies to be promoted, subsidized and implemented. To achieve this, it is important to quantify the hydrologic impacts of any new investment or policy in the water sector. Normally, irrigation engineers and planners are trained to look at field scale efficiencies or irrigation system efficiencies at the most. Also, many of the tools used by irrigation engineers are field scale oriented (e.g. FAO AquaCrop model). The serious consequences of these actions are to worsen water scarcity, increase vulnerability to drought, and threaten food security.
There is an urgent need to develop simple and pragmatic tools that can evaluate the impact of field scale crop-water interventions at larger scales (e.g. irrigation systems and basins). Although basin scale hydrological models exist, many of these are either overly complex and unable to be used by practitioners, or not specifically designed for the upscaling from field interventions to basin scale impacts. Moreover, achieving results from the widely-used FAO models such as AquaCrop into a basin-wide impact model is time-consuming, complex and expensive. Therefore, FutureWater is developing a simple but robust tool to enhance usability and reach, transparency, transferability in data input and output. The tool is based on proven concepts of water productivity, water accounting and the appropriate water terminology, as promoted by FAO globally (FAO, 2013). Hence, the water use is separated in consumptive use, non-consumptive use, and change in storage (see Figure).
A complete training package is developed which includes a training manual and an inventory of possible field level interventions. The training manual includes the following aspects: 1) introduce and present the real water savings tool, 2) Describe the theory underlying the tool and demonstrating some typical applications, 3) Learn how-to prepare the data required for the tool for your own area of interest, 4) Learn when real water savings occur at system and basin scale with field interventions.
There is so far no accepted general methodology for assessing the significance of climate risks relative to other risks to water resources projects that the World Bank Group supports and invests in. The Independent Evaluation Group (IEG) in its 2012 report entitled “”Adapting to Climate Change: Assessing the World Bank Group Experience””, found that “climate models have been more useful for setting context than for informing investment and policy choices” and “they often have relatively low value-added for many of the applications described” and that “although hydropower has a long tradition of dealing with climate variability, the Bank Group lacks guidance on appropriate methods for incorporating climate change considerations into project design and appraisal.”
The book “”Confronting Climate Uncertainty in Water Resources Planning and Project Design: The Decision Tree Framework”” by Casey Brown and Patrick Ray was published in 2015. Since then, the Decision Tree Framework (DTF) has been applied to Bank projects facing diverse situations in six pilots covering hydropower, water supply, and irrigation with funding from the Water Partnership Program (WPP). This effort is continuing in two additional pilots with financing from the Korea Green Growth Trust Fund (KGGTF) targeting the resilience component of water security of flood protection and irrigation in the Nzoia River basin in Kenya and the application of the Hydropower Sector Climate Resilience Guidelines (which in turn are based on the DTF) to the Kabeli-A hydroelectric project in Nepal.
Together with partners, FutureWater applies the following bottom-up methodology DTF to the Nzoia irrigation project in Kenya and the Nepal’s Kabeli-A run-of-river hydroelectric project study. FutureWater´s main tasks are assessing risks using crop modeling and water allocation modeling of the Nzoia case study, and hydrological modeling of the high-mountain region in Nepal.
HI-AWARE is one of four consortia of the Collaborative Adaptation Research Initiative in Africa and Asia (CARIAA). HI-AWARE aims to contribute to enhanced adaptive capacities and climate resilience of the poor and vulnerable women, men, and children living in the mountains and flood plains of the Indus, Ganges, and Brahmaputra river basins through the development of robust evidence to inform people-centred and gender-inclusive climate change adaptation policies and practices for improving livelihoods.
- Generate scientific knowledge on the biophysical, socio-economic, gender, and governance conditions and drivers leading to vulnerability to climate change;
- Develop robust evidence to improve understanding of the potential of adaptation approaches and practices, with an explicit focus on gender and livelihoods;
- Develop stakeholder-driven adaptation pathways based on the up- and out-scaling of institutional and on-the-ground adaptation innovations;
- Promote the uptake of knowledge and adaptation practices at various scales by decision-makers and citizens; and
- Strengthening the interdisciplinary expertise of researchers, students, and related science-policy-stakeholder networks.
HI-AWARE will focus its activities in 12 sites, representing a range of climates, altitudes, hydro-meteorological conditions, rural-urban continuum, and socio-economic contexts in four study basins: the Indus, Upper Ganga, Gandaki and Teesta. It will conduct research in these sites, including modeling, scoping studies, action research, and randomized control trials. It will test promising adaptation measures in observatory labs at the sites for out-scaling and up-scaling. It will also conduct participatory monitoring and assessment of climate change impacts and adaptation practices to identify:
- Critical moments – times of the year when specific climate risks are highest and when specific adaptation interventions are most effective;
- Adaptation turning points – adaptation turning points – when current policies and management practices are no longer effective and alternative strategies have to be considered; and
- Adaptation pathways – sequences of policy actions that respond to adaptation turning points by addressing both short term responses to climate change and longer term planning.
FutureWater’s main tasks focus on biophysical drivers and conditions leading to vulnerability to climate change. Key tasks are to:
- Develop detailed mountain specific and basin scale climate change scenarios;
- Improve cryosphere-hydrological modeling to assess significant shifts in flow regimes with an aim to develop water demand and supply scenarios as well as improve and apply water-food impact models; and
- Better understand climate change impacts on extremes (heat, floods, drought),and quantify these extremes from climate models and subsequently impact models.
Water is becoming an increasingly critical factor in Asia. The catchments of Hindu – Kush Himalayan (HKH) are a source of a significant portion of this water. Glaciers are a component of the HKH water budget. There is general agreement that a widespread retreat of the global ice cover has been occurring since at least the late 1800s. However, a consensus view of the significance of this retreat in terms of factors determining glacier mass balance, or the resulting water resources and general environmental impacts has not been reached for the HKH mountains. It is believed that only a combined effort of local observation, remote sensing and simulation modeling can lead to a better understanding of what’s happening. Especially the modeling is essential to provide projections for the future.
FutureWater has conducted a review of current state of knowledge in (i) climate change datasets and downscaling used for glacier and high mountain modelling, (ii) glacier and snow contribution to river runoff in the HKH region, (iii) hydrological modelling studies used for glacier and high mountain environments and, (iv) downstream impacts of climate change on the HKH region.
The climate, cryosphere and hydrology of the Hindu-Kush Himalaya (HKH) region have been changing in the past, and will continue to change in the future; warming of the climate system is unequivocal. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, sea level has risen, and the concentrations of greenhouse gases have increased. The Himalayan region has the third largest deposit of ice and snow in the world, after Antarctica and the Arctic and might be exceptionally vulnerable. There is good agreement among Global Climate Models (GCM) on future temperature trends in the region, but projections of future precipitation patterns differ widely. As a consequence, the demand for increased knowledge about future climate change is still high. A main focus has been given to temperature increases and changes to the hydrological cycle with the tendency that wetter regions mainly will become wetter and drier regions will become drier. Growing scientific knowledge and recent weather events show that extremes related to hydrological changes can be substantial though and the geographical and time-wise resolution of predicted changes is still low in many areas.
Energy is one of the major drivers of changes in the HKH region. The region has a high potential for hydropower due to abundance of water in conjunction with verticality of landscape. However, the changing climate and hydrological regime might pose a risk to hydropower development in the future. It has become imperative for hydropower developers to have a good understanding about the changes in the hydrological cycle and its uncertainty. Also, changing probabilities and magnitudes of extreme events can put additional risk on hydropower infrastructures.
The overall objective of this project is therefore to improve the understanding of the expected impacts of climate change on water availability in the context of potential hydropower development in the Tamakoshi River Basin. Specifically, the project aims to:
- Understand the current baseline hydrological regime of the Tamakoshi River Basin
- Develop detailed climate change projections for the 21st century, including factors relevant for hydropower development
- To understand the future hydrology and its potential impact on the hydropower potential
Global warming is considered as one of the major threats for the world’s population and coping with it may be one of the largest challenges for this century. Multiple attempts to streamline global policy on climate change mitigation have been made over the past decades, and the “Paris Agreement” which was signed at the 21st Conference of the Parties in 2015 is considered a major breakthrough in formulating adequate measures to tackle climate change. Governments agreed on “a long-term goal of keeping the increase in global average temperature to well below 2°C above pre-industrial levels”, and “to aim to limit the increase to 1.5°C, since this would significantly reduce risks and the impacts of climate change”. In response to this development, the Intergovernmental Panel on Climate Change (IPCC) will publish a Special Report on global warming of 1.5 °C above pre-industrial levels, and is gathering scientific content for this report.
However, scientific evidence of the impacts of a 1.5 ˚C global warming, and more importantly, the differences in impacts between a 1.5 ˚C and a 2 ˚C global warming, is lacking. Therefore, the scientific community has been mobilized to provide this scientific evidence as input to the special report. FutureWater leads a regional assessment quantifying the impacts of a 1.5 ˚C versus a 2 ˚C global warming for a major global climate change hotspot: the Indus, Ganges and Brahmaputra river basins in South Asia.