Assessing the Prospects of Transboundary Multihazard Dynamics: The Case of Bhotekoshi—Sunkoshi Watershed in Sino—Nepal Border Region

The impacts of multihazards have become more pronounced over the past few decades globally. Multiple hazards and their cascading impacts claim enormous losses of lives, livelihoods, and built environment. This paradigm prompts integrated and multidisciplinary perspectives to identify, characterize, and assess the occurrence of multihazards and subsequently design countermeasures considering impending multihazard scenarios at the local level. To this end, we considered one of the most egregious transboundary watersheds, which is regarded as a multihazard hotspot of Nepal, to analyze the underlying causes and cascade scenarios of multihazards, and their associated impacts. In this paper, geophysical, hydrometeorological, and socioeconomic perspectives are formulated to characterize the watershed from the dimension of susceptibility to multihazard occurrence. To characterize the complex dynamics of transboundary multihazard occurrence, insights have been presented from both the Nepali and the Chinese sides. Individual case studies and the interrelation matrix between various natural hazards are also presented so as to depict multihazard consequences in the transboundary region. The sum of the observations highlights that the watershed is highly vulnerable to a single as well as multiple natural hazards that often switch to disasters.

Socio-hydrological approach to understand conflict and cooperation dynamics in transboundary rivers

<p>Transboundary river basins share a complex network of environmental, economic, political, social and security interdependencies. Consequently, transboundary river systems are characterized by evolving conflict and cooperation dynamics between riparian states. The current literature on transboundary watersheds does not identify the key feedback loops between interconnected political, cultural, institutional and socioeconomic factors. This work compares sociohydrological models of three transboundary rivers (Nile River, Columbia River, and Lancang-Mekong River) with distinct characteristics in terms of hydrological processes and socioeconomic conditions. Conflict/cooperation dynamics within these three models were found to be driven by hydrological regime, economic benefits, power imbalance and institutional capacity. By comparing the contextual factors of the emergent conflict/cooperation dynamics across these three river basins, our synthesis study aims to present a general framework that explains how conflict/cooperation dynamics emerge from the interaction between human and hydrological systems.</p>

A Metacoupling Framework for Exploring Transboundary Watershed Management

Water is crucial for ecosystem health and socioeconomic development, but water scarcity is becoming a global concern. Management of transboundary watersheds is inherently challenging and has the potential to lead to conflict over the allocation of water resources. The metacoupling framework, which explores the relationships between coupled human and natural systems that are nested within multiple different scales, has been proposed to inform more holistic management of transboundary watersheds. This paper provides the first attempt to apply a metacoupling framework to a transboundary watershed for an improved integrated understanding of this complex system at multiple spatial scales. It does so with the transnational Limpopo River watershed in Southern Africa, which covers 1.3% of the continent and supports the livelihoods of 18.8 million people living in Botswana, Mozambique, South Africa, and Zimbabwe. Sub-Saharan Africa is experiencing a growing gap between water availability and demand; the primary drivers are population growth and agriculture expansion. The novelty of the paper is outlining the importance of applying a metacoupling framework to transboundary watersheds, identifying the limitations to this application, and providing a detailed assessment of the steps needed to complete this application. We also identify directions for future research including application of a metacoupling framework to other transboundary watersheds and exploration of spillover effects and externalities within this and other transboundary watersheds.

A New Scenario-Based Framework for Conflict Resolution in Water Allocation in Transboundary Watersheds

One of the main causes of water conflicts in transboundary watersheds all over the world is represented by the increasing water demand due to urban, industrial, and agricultural development. In this context, water scarcity plays a critical role since, during a drought period, water supply is not sufficient to cover the demand of all water uses. In this work, we have conceptualized and developed a new scenario-based framework able to improve the sustainability and equity of water allocation among two or more riparian countries. The proposed approach is in accordance with the United Nations Watercourses Convention. It considers a hydraulic/hydrologic model, a water-management model, and combines them with multi-criteria decision analysis (MCDA) and what if scenario analysis (WISA). The suggested framework was applied to the transboundary watershed of Cuareim/Quaraí river (Uruguay/Brazil) to tackle a real water-sharing conflict. It resulted in being very flexible in exploring various policy options and test and quantifying them with different scenarios to reach an objective and impartial decision in a water-sharing issue. This framework can effectively be applied to any other transboundary watershed to resolve any possible conflict related to water-allocation/water-management matter.

Gestion des bassins hydrographiques transfrontaliers et institutionnalisation

The Grupo Gestor Binacional de la Cuenca del Río Goascorán (GGBCG) was created in 2007 as an original initiative managing a shared basin in the Eastern part of El Salvador-Honduras boundary. In less than twenty years, the issue of confrontation in this border area has led to a logical approach to reconciliation and cooperation through shared management of the Río Goascorán basin. This article analyzes the ways in which the actors involved understand this cooperation. The initiative that is studied is part of a regional context that is of interest for the management of transboundary river basins. Several elements relevant to the analyzed case are addressed, including the difficulty of cross-border action and shared management, the turnover of the actors involved, and the forms of institutionalization on which the management of transboundary watersheds can be based. Spanish Este artículo se interesa en la conformación del Grupo de Gestión Binacional de la Cuenca del Río Goascorán (GGBCG) en el año 2007, como una iniciativa original de gestión de una cuenca compartida en la parte oriental de la frontera Honduras-El Salvador. El artículo muestra cómo en menos de veinte años, la problemática de enfrentamiento en este sector fronterizo dio lugar a una lógica de acercamiento y de cooperación por medio de la gestión compartida de la cuenca del Río Goascorán. También se analizan las formas en que los actores involucrados conciben la cooperación alrededor de la cuenca. El presente artículo resalta varios elementos de reflexión a través del caso analizado: la dificultad de la acción transfronteriza y de la gestión compartida; la renovación de los actores involucrados; así como las formas de institucionalización sobre las cuales puede basarse la gestión de cuencas transfronterizas que invitan a interrogarse sobre la conformación del GGBCG. French Cet article s'intéresse à la constitution depuis 2007 d'un Grupo Gestor Binacional de la Cuenca del Río Goascorán (GGBCG) comme initiative originale de gestion d'un bassin partagé sur la partie orientale de la frontière Honduras-El Salvador. L'article montre comment, en moins de vingt ans, la problématique d'affrontement sur ce secteur frontalier longtemps en litige a laissé la place à une logique de rapprochement et de coopération par le biais de la gestion partagée du bassin du Río Goascorán. Il analyse également les formes sous lesquelles les acteurs impliqués conçoivent la coopération autour du bassin. L'initiative étudiée s'inscrit dans un contexte régional d'intérêt pour la gestion des bassins hydrographiques transfrontaliers. Cet article met en lumière plusieurs éléments de réflexion à travers le cas analysé : la difficulté de l'action transfrontalière et de la gestion partagée ; le renouvellement des acteurs mobilisés ; les formes d'institutionnalisation sur lesquelles peut reposer la gestion de bassins transfrontaliers, que la création du GGBCG invite à interroger.