Transboundary Water Research Articles

Cascade reservoirs affected chemical compositions of dissolved organic matter and greenhouse gas dynamics in the Lancang River.

Dissolved organic matter (DOM) is an important component in aquatic systems. There has been much debate about the potential effects of cascade reservoirs on the transport and transformation of DOM. Here, through a survey of source to leave-boundary section of Lancang River (LCR) in June and November of 2017-2018, our results revealed that weak spatiotemporal variations were observed for DOC content, whereas DOM parameters were significantly different between natural and reservoir reaches. And DOM showed higher humification degree from allochthonous sources with increasing autochthonous matter in reservoir reach, may due to high particulate organic matter and releasing autochthonous DOM from phytoplankton blooms in the LCR, which can be evidenced by depleted DIC, enriched δ13CDIC and higher BIX. A unique fluorescent fraction (C5) appeared in the reservoir reach and increased along water flow, which was strongly associated with dissolved CO2 and N2O. Meanwhile, BIX value decreased with increasing dam height, hydraulic residence time (HRT), and reservoir capacity, which may promote CH4 production, highlighting variation of DOM compositions in understanding the effect of greenhouse gas (GHG) dynamics in the LCR. The findings were essential for comprehending the influences of cascade reservoirs on carbon cycle, and informed policy development for the sustainable management of transboundary water resources like the LCR.

Literature review on optimization of transboundary water for irrigation

ABSTRACT Transboundary water resources are essential for agricultural sustainability and regional development, and they are intrinsically linked to achieving the United Nations' SDGs and the water-food-energy nexus (WFE-NEXUS) concept. Despite challenges such as conflicting allocation and climate change impacts, effective transboundary water management for irrigation is crucial to meeting the SDGs of eradicating hunger, providing clean water and sanitation, offering affordable and sustainable energy, and taking climate action. This work synthesizes approaches to transboundary water for irrigation optimization, highlighting the significance of a holistic plan that considers both technical and social factors. Remote-sensing technologies, data forecasting, hydrology and hydraulic modelling, and water resource modelling all contribute to maximize water allocation and policy creation, particularly when paired with collaborative government features. This integrated approach to transboundary water for irrigation optimization fosters long-term development by improving livelihoods, resilience, and inclusive growth through efficient resource management.

Water quality and pollution source apportionment responses to rainfall in steppe lake estuaries: A case study of Hulun Lake in northern China

Hulun Lake, the largest inland steppe lake in China, is encountering severe water quality degradation. Estuaries play important roles in material and energetic exchange between rivers and lakes. The water quality at the estuaries of Hulun Lake directly reflects the impact of both human activities and natural factors on the lake’s overall water quality, especially during rainfall events. From July 28, 2021, to August 4, 2021, water samples from 62 sites were collected in the three estuaries of Hulun Lake before and after a moderate rainfall event. 13 water parameters, including dissolved oxygen (DO), Turbidity (Tur), Total Nitrogen (TN), Total Phosphorus (TP), Total Organic Nitrogen (TON), and Total Organic Phosphorus (TOP) were measured. The spatio-temporal distribution of water quality in the estuaries was assessed based on water quality index (WQI). Besides, an improved approach integrating stepwise linear regression (SLR) and principal component analysis (PCA) was utilized to construct a WQImin model for an effective assessment of water quality in these estuaries. Furthermore, the absolute principal component scores-multiple linear regression (APCS-MLR) model was employed to identify and quantify the environmental drivers underlying the water quality in the estuaries. The results of WQI indicated that the water quality of the sites in the estuaries of Hulun Lake was “medium” or “poor”, both before and after the rainfall, with a general deterioration in water quality in response to the rainfall. The simplified WQImin model consisted of 5 crucial parameters (i.e., TN, TP, ammonium (NH4+-N), Tur, and permanganate index (CODMn)), and it performed well without parameter weights. Spatial differences in some water parameters among the estuaries were detected, which were attributed to the natural factors and human activities upstream. The principal environmental factors affecting the water quality in the estuaries consisted of hydrodynamic processes, internal phosphorus release, external phosphorus input, external nitrogen input, nitrification in the estuaries, and external organic input and internal organic release. Therefore, we propose basin management strategies such as limiting grazing pressure, adopting enclosed pasture, wetland restoration, optimizing water renewal cycle in Hulun Lake, and transboundary water quality management to tackle water contamination in Hulun Lake.

A Bibliometric Review and Interdisciplinary Analysis of the Brahmaputra River

In this study, we visualize and analyze the literature on the Brahmaputra river using a spectral clustering algorithm, tracking research trends over time. We found that the focus of research on the Brahmaputra has changed over time in the last decade, with a shift from geology to hydrology and geochemistry and a rapid growth in climate change research in recent years. In the future, potential hot topics may be “water resource management” and other topics related to transboundary water resource management and cooperation. At the same time, this study also analyzes in detail the keywords and clusters “geohydrology” and “ecological risk and sustainable development”, among other topics. We believe that future research should carefully consider the potential effects of transdisciplinary research trends. For instance, it is urgent that transborder governance and management regimes be renovated through joint efforts and cross-border effective actions carried out by multifaceted and multi-scalar agencies along this river.

Policy Options for Achieving Sustainable Development Goals (SDGs) in the MENA Region through the Effective Implementation of Multilateral Environmental Agreements

The Middle East and North Africa (MENA) region faces a complex set of challenges, including political instability, economic disparities, and environmental degradation. Achieving the Sustainable Development Goals (SDGs) in this region is paramount to ensuring a sustainable and prosperous future for its diverse populations. Multilateral Environmental Agreements (MEAs) play a crucial role in addressing environmental issues, which are intertwined with many of the SDGs. This paper explored policy options that can help the MENA region make significant strides towards achieving the SDGs through the effective implementation of MEAs. To achieve this, the MENA region will be required to strengthen regional cooperation through the development and implementation of regional agreements that are tailored towards shared environmental issues, such as trans-boundary water management in the Nile River basin or tackling air pollution in the Gulf Cooperation Council (GCC) countries. Strategies for the adoption of policies on the region’s prevalent issues such as drought and desertification, renewable energy transition, biodiversity conservation, climate change mitigation and adaptation will have to be negotiated, developed, strengthened, and implemented. The paper utilised a content analysis research approach in analysing selected international and regional MEAs. The paper highlights the challenges with the implementation of both international and regional MEAs, with a view to raising awareness on the shortcomings and challenges of implementation of these very important environmental treaties. Achieving the SDGs in the MENA region through the implementation of MEAs requires a coordinated effort amongst nations, international organisations, and civil society. By prioritising regional cooperation, sustainable resource management, renewable energy adoption, biodiversity conservation, climate action, waste management and education, the MENA region can make significant progress towards a more sustainable and prosperous future. These policy options offer a roadmap to address pressing environmental challenges whilst simultaneously advancing the broader agenda of sustainable development.

Prerequisites for Increasing Contradictions between Iran and Afghanistan over the Use of Transboundary Water Resources of the Helmand River

Prerequisites for Increasing Contradictions between Iran and Afghanistan over the Use of Transboundary Water Resources of the Helmand River

Troubling environmental governance: citizen legal experiments with transboundary commons

ABSTRACT Environmental phenomena shed light on the fiction that inter-state borders constitute on some level, and the limitations of state-based environmental governance. Transboundary watersheds, in particular, flow across borders of different kinds, evincing the interdependence of water bodies, both human and nonhuman. The lack of cross-border comprehensive environmental governance imposes regional forms of inequity and inefficient forms of water protection. In Central America, to address such problems, citizens have created a legal prototype for how transboundary watersheds could be governed as a commons going forward. This endeavour has been led by Salvadorans, concerned as they are by their country’s position as a lower co-riparian and their significant interdependence with transboundary water bodies. I argue that, in addition to destabilizing established approaches to environmental governance, the legal prototype opens avenues for forms of earthly politics and multispecies justice by placing the reproduction of life, human and nonhuman, side by side.

Reassessing water resource challenges in a changing climate in the Kagera transboundary river basin, Tanzania

The dynamic shifts in climatic patterns, particularly alterations in precipitation, have significantly impacted water resource availability and accessibility. These climate-induced changes affect hydrological processes, encompassing runoff, groundwater replenishment, water demand, and biophysical patterns within river basins. This study seeks to unravel the multifaceted implications encountered and challenges in water resource management within the river basin. It employed a survey-based approach for data collection, including Key informant interviews (KI), consultation methods and documentary reviews. The study utilized Statistical Package for the Social Sciences (SPSS) and Microsoft Excel for quantitative analysis and thematic synthesis for qualitative insights, including local community perspectives. The findings reveal substantial fluctuations in precipitation, protracted droughts, severe flooding, and other climatic extremes. The observed annual mean rainfall of 832 mm, with a standard deviation of 248, a standard error of 361, and a skewness of −945, accentuates the pronounced variability in mean precipitation, exhibiting a declining trend indicative of climatic shifts (R2 = 0.1797 and P = 0.002). The challenges are limited access to hydrological and meteorological data, undermining prediction accuracy, infrastructure planning, and response strategies for water resource allocation and management. The absence of unified approaches, influenced by the politics of riparian states, feeble coordination, conflicting sectoral policies, and ambiguous priorities, hinders effective transboundary water resource management. The study addresses these complexities and advocates for institutionalizing robust water management strategies that capitalize on existing resources and foster innovative capacities among critical stakeholders. Central to these efforts is harmonizing and enforcing policies, regulations, and laws governing water use, coupled with a concerted focus on inclusive governance to ensure the sustainability of water resource management. Such effort entails synchronized strategies, programs, plans, and livelihood practices underpinned by active stakeholder involvement in pivotal facets of water resources management.

A traditional ecological knowledge summit

A traditional ecological knowledge summit The Global Center for Climate Change and Transboundary Waters (GCTW) cohosts a Traditional Ecological Knowledge Summit (1), as Gail Krantzberg (2), Peter Czajkowski, Dawn Martin-Hill, Rohini Patel, Hiliary Monteith, and Drew Gronewold explain. The Global Center for Climate Change and Transboundary Waters (GCTW) integrates hydroclimate modeling, water quality forecasting, and community-engaged mixed methods that harmonize and propagate Traditional Ecological Knowledge (TEK), Indigenous Knowledge (IK), and Western Science (WS) into robust 21st-century transboundary water resources governance protocols. The U.S. National Science Foundation and the Canadian Social Science and Humanities Research Council fund the Center. It supports a multinational network of researchers that is designed to promote information sharing across borders.

India-Bangladesh Conflict: An Overview

Abstract: The India-Bangladesh conflict primarily revolves around historical, territorial and resource-related disputes that have shaped the bilateral relationship between the two neighbouring South Asian countries. Emerging from the Partition of British India in 1947 and the subsequent creation of East Pakistan (now Bangladesh), tensions escalated during the 1971 Bangladesh Liberation War, which resulted in Bangladesh's independence with Indian military support. Key areas of conflict have included the demarcation of borders, particularly over the disputed enclaves, the maritime boundary in the Bay of Bengal, and the sharing of transboundary river waters, such as the Ganges and the Teesta. While the Land Boundary Agreement of 2015 resolved several border issues, the water-sharing disputes remain unresolved, particularly concerning the Teesta River, which is critical to Bangladesh’s agriculture. Additionally, non-traditional security concerns such as illegal migration, cross-border insurgencies, and trafficking continue to challenge bilateral relations. Nevertheless, India and Bangladesh have strengthened their cooperation in recent years, particularly in trade, energy and regional security, while both countries seek to balance their national interests within a framework of diplomacy and economic interdependence. This overview highlights that while conflict persists in certain areas, India and Bangladesh have made significant strides in resolving disputes and fostering collaboration, although challenges remain in ensuring equitable resource distribution and addressing mutual security concerns.

Transboundary Water Allocation under Water Scarcity Based on an Asymmetric Power Index Approach with Bankruptcy Theory

Cooperative and self-enforceable water allocation is a key instrument to manage geopolitical conflict induced by water scarcity, which necessitates the cooperative willingness of the agents and considers their heterogeneity in geography, climate, hydrology, environment and social economy. Based on a multi-indicator system that contains asymmetric information on water volume contribution, current water consumption, water economic efficiency and efforts for eco-environmental protection, this study proposed a water allocation framework by combining the asymmetric power index approach with bankruptcy theory for solving the transboundary water allocation problem under scarcity. The proposed method was applied to the Yellow River Basin in northern China, which is mainly shared by nine provincial districts and frequently suffers from severe water shortages, and its results were compared with six alternative methods. The results highlight the necessity of quantifying agents’ willingness to cooperate under the condition of asymmetric negotiation power when making decisions on transboundary water allocations. The proposed method allows for transboundary water allocations through simultaneous consideration of the agent’s willingness to cooperate and asymmetric negotiation power, as well as disagreement allocation points, which ensure the stability, fairness and self-enforceability of allocation results. Therefore, it can offer practical and valuable decision-making insights for transboundary water management under water scarcity.

Application of DPSIR model to ascertain driving forces and their impacts on the Volta basin

Managing trans-boundary water and its watershed areas is a challenging task. The riparian countries sharing the boundary may have different economic and national goals that can dictate the pressures exerted on water bodies and their catchments areas. The pressure will have dire consequences on the environment, the climate and the sustainability of the Volta River. This paper seeks to apply the Driving Forces-Pressure-State-Impact-Response (DPSIR) framework as a model to ascertain the driving forces and their impacts on the Black and the White sub-basins of the Volta River. The research was carried out through desk study of literature, reports and policies on the Volta basin as well as information from international bodies such as World Bank, United Nations, and European Union among others. The DPSIR framework thus established the state of the ecosystem, pressure exerted, impact and the responses to provide scientific basis for decision-making and address the impacts on the Volta River. The DPSIR framework was focused on Ghana and Burkina Faso due to their large share of the basin. Burkina Faso's share of the Volta basin area is 43 %, whereas, that of Ghana is 41.6 %. The use of DPSIR model will help stakeholders and policy makers in proper decision making. It was therefore recommended that there should be policy regulations to reduce the impact on the environment.

A Model for Water Quality Assessment, Monitoring, and Management in Transboundary Water Objects

A Model for Water Quality Assessment, Monitoring, and Management in Transboundary Water Objects

The role of third parties in shaping transboundary cooperation of the Sixaola river basin (Costa Rica and Panama): an analysis through States’ involvement, technocratic turn, and reterritorialization

Transboundary water management in the Sixaola basin, shared by Costa Rica and Panama, has historically involved significant contributions from thrid - third and not thrid - parties. This study investigates their evolving roles and the implications for governance in this context. We conducted a comprehensive analysis of non-State actors interventions over time, focusing on changes in strategies, priorities, and their impact on transboundary basin governance. Our findings indicate that while non-state actor initiatives have attracted attention and financial resources, they have also introduced significant governance challenges, leading to inconsistencies in basin development. The analysis reveals that limited governmental involvement and the technocratic turn in development strategies have raised questions about basin development and its tangible impacts. Additionally, reterritorialization efforts highlight a local tendency to better align existing functional spaces with local concerns. This study contributes to the literature on transboundary basin management by providing insights into the multifaceted role of non-state actors in the Sixaola basin. It explores a case where governments remain distant in defining governance systems, highlighting the added value of focusing on non-state actors to grasp the complexity of hydropolitics and discussing the politics of river basin development.

A safe operating space for the major rivers in the Bangladesh Delta

Abstract The contributions of water to all Sustainable Development Goals (SDGs) are critical to achieving SDGs in the context of climate change. This poses a major challenge as nearly 40% of the global population lives under water scarcity, including areas such as Bangladesh, which is one of the largest, most populous and climate-vulnerable deltas (Ganges–Brahmaputra–Meghna: GBM) in the world. Here, we aim (first attempt) to analyse the historical dynamics (spatial and temporal) of river flows in 10 major rivers and provide policy implications using a safe operating space (SOS) concept for the Bangladesh delta. In general, the space just before the unsustainable state is defined as an SOS, within which humanity can safely thrive and beyond which is dangerous to humanity. Time series analysis highlights that all seasonal river flow shows a decreasing trend in the last three decades except in the winter season. The hydrological alteration using range of variability approach confirms that the majority of the river flow has been altered high to severely including three major rivers (Ganges, Jamuna, and Old Brahmaputra) in the Bangladesh delta. Our findings show that four out of ten rivers (Ganges (dry season), Gorai, Halda and Old Brahmaputra) exceeded the SOS, with the rest of the six rivers given cautious status considering the hydrological alteration (moderate to severe) in the Bangladesh delta. Our assessment provides scientific evidence to inform science and policy related to transboundary water disputes and achieving SDGs in Bangladesh and South Asia.

Transboundary Water Management in Central Asia and the Iberian Peninsula: Path Dependence Approach

This article examines the historical background and the state of the art of transboundary water management in the Central Asian region, which includes the republics of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan, on one hand, and the Iberian Peninsula, which consists of the Kingdom of Spain and the Republic of Portugal, on the other hand. These distances from each other regions are studied for the reason that both of them are located in arid landscapes and further climate change is posing grave challenges to transboundary water security. By highlighting the differences and similarities in the water management practices of Central Asia and the Iberian Peninsula, this article employs a path-dependence approach to shed light on new perspectives on good water management. As a result of identified opportunities, the Central Asian states could enhance their policy in the water management system and adopt new measures based on positive foreign experience.

Climate change impact on water scarcity in the Hub River Basin, Pakistan

The Hub River Basin (HRB), a critical transboundary water source for Sindh and Baluchistan provinces in Pakistan, may face worsening water scarcity due to climate change and population growth. This study aims to assess the current state of water scarcity in the HRB and assesses its vulnerability to these pressures in future. To evaluate the baseline water scarcity in the HRB, a calibrated and validated Soil and Water Assessment Tool (SWAT) was established. Five General Circulation Models (GCMs) were employed to project the future climate under Representative Concentration Pathways (RCP 4.5 and 8.5) for the HRB. Sector-specific indicators were also used to assess the temporal and altitudinal sensitivity of the basin to climate change. These climate projections were incorporated in the SWAT model to simulate flows for three different periods: Early Future (EF; 2010–2039), Mid Future (MF; 2040–2069), and Far Future (FF; 2070–2099). The SWAT model results indicate significant increase in mean flows simulated by SWAT, ranging from 15.27 to 52.78 m3/s under RCP 4.5 and RCP 8.5 compared to baseline flows at HRB. Additionally, the study examines the temporal variation in basin stress and scarcity levels using Falkenmark and Water scarcity indicators. The findings indicate a general decrease in the basin's stress and scarcity levels, potentially benefiting water users of the HRB, especially under RCP8.5. This study offers crucial insights for shaping policies and strategies to adapt to climate change and population growth, ultimately aiming to minimize their impacts on HRB's water resources. By informing water managers and promoting sustainable water management practices, this research can help prevent future conflicts over water allocation and infrastructure development linked with the HRB.

Beyond the Border: Exploring the Complex Dynamics of Water Tensions Between India and China

This paper explores the historical context and current dynamics of the transboundary water issues between India and China. Both countries share multiple transboundary river basins, with the Brahmaputra River being one of the most significant. The importance of the Brahmaputra River to both nations goes beyond just providing resources. It has implications for national security, regional stability, and human livelihoods. However, China's upstream control over the river and its extensive dam-building projects have raised concerns in downstream India and Bangladesh about potential impacts on water availability, agriculture, and livelihoods. The river system is critical for the socioeconomic well-being of millions of people, yet the competing demands for water resources have led to geopolitical tensions. The paper highlights China's strategic use of water resources, including plans for large-scale dams, which India views as a potential threat to its water security. It also underscores the importance of a nuanced understanding of hydropolitics, emphasizing the need for human security, particularly water security, in addressing these challenges. It argues that while "water wars" are unlikely, "water tensions" are significant and must be addressed through comprehensive bilateral agreements and collaborative efforts.

A Harmony-Based Approach for the Evaluation and Regulation of Water Security in the Yellow River Water-Receiving Area of Henan Province

Water security, as a crucial component of national security, plays a significant role in maintaining regional stability and ensuring the healthy and rapid development of the economy and society. The Yellow River water-receiving area of Henan Province (YRWAR-HN) is selected as the research area in this study. Firstly, a comprehensive evaluation index system is constructed based on the actual water security problems of the research area, and the single index quantification–multiple indices syntheses–poly-criteria integration method (SMI-P) is introduced to quantify the water security degree of 14 cities in the YRWAR-HN from 2010 to 2021. Then, the obstacle degree model is used to identify the key obstacle indexes that restrict the improvement of water security. Finally, the harmonious behavior set optimization method is adopted to carry out the regulation of water security, and the improvement path of water security in the YRWAR-HN is formulated. The results indicate the following: (1) the water security degree of the YRWAR-HN shows a fluctuating upward trend, increasing from 0.4348 (2010) to 0.6766 (2021), a significant rise of 55.61%. The water security level improves from the relatively unsafe level to the relatively safe level. Hebi City exhibits the fastest rate of water security improvement, while Xinxiang City shows the slowest rate. (2) The density of the river network (X1) and the proportion of investment in water conservancy and environmental protection in the total investment (X15) are the two indexes with the highest obstacle degree, with the average obstacle degrees being 15.09% and 10.79%, respectively. (3) The combination of the composite regulation scenario and improvement Path 2 is the optimal regulation strategy for water security in the YRWAR-HN. From the implementation process, Luoyang, Sanmenxia, Jiyuan, Xuchang, and Shangqiu may prioritize improving their flood and drought disaster defense capabilities and emergency response capabilities, continuously enhancing the flood prevention and disaster reduction system. Zhengzhou, Kaifeng, Xinxiang, Jiaozuo, Anyang, Hebi, Pingdingshan, and Zhoukou may prioritize resolving the regional water supply and demand conflicts, balancing development and conservation, actively seeking transboundary and external water transfers, and strengthening the capacity for water conservation and intensive utilization. Puyang City may prioritize enhancing its comprehensive water environment management capabilities, increasing investment in water conservancy and the environment, improving production processes, reducing pollutant emissions, and mitigating agricultural non-point source pollution.

A Study the concept and legal principles of Water Management

Water management is a multifaceted concept that encompasses the planning, development, distribution, and optimal use of water resources. It is crucial for ensuring the sustainable supply of water for various human needs, including drinking, agriculture, industry, and recreation, while also maintaining the health of aquatic ecosystems. Effective water management involves the integration of scientific, technical, economic, and social considerations to balance competing demands and protect water quality. Legal principles play a pivotal role in guiding water management practices. These principles provide a framework for regulating water use, resolving conflicts, and promoting sustainable practices. Key legal principles in water management include the doctrine of equitable and reasonable use, which ensures fair allocation of water resources among users; the precautionary principle, which mandates proactive measures to prevent water pollution and degradation; and the principle of public participation, which emphasizes the importance of involving stakeholders in decision-making processes. International agreements and national laws often incorporate these principles to address transboundary water issues and domestic water governance. Effective implementation of these legal frameworks requires robust institutional arrangements, transparent governance, and enforcement mechanisms.