There were concerns that Lake Arenal in Northern Costa Rica was threatened due to problems of deforestation and possible premature sedimentation, leading the government to take action, resulting in successful national and local benefits in terms of energy produced and area irrigated. The most important lesson learned is the importance of consulting all parties involved before initiating the project to achieve the best result.
The Costa Rican government decided to revise its system of water use levy when it became evident that it was disproportionately low. Action was taken by key stakeholders to reconstruct a design of the water use levy to reflect two basic elements of water charge: water use rights and environmental water services. From this experience, the most important lesson is that political will must support legal and technical works when reforming economic instruments.
El Salvador has experienced an increased vulnerability due to Climate Change. To tackle the challenges, an Early Warning System has been installed. This is part of the strategy of the local government to reduce the vulnerability and develop the capacity of the area to deal with floods and landslides. One lesson learnt is that political stability in an area is a great asset when carrying out any political reform.
The overexploitation and pollution of water resources of the San Jeronimo River, together with agricultural developments and deforestation, have generated conflicts between bordering communities. To address these, the San Jeronimo Basin Committee was created, mantling the role as a negotiating body and with a mission to implement IWRM. The key lesson learnt is that for success, it is crucial that local organisations take their social responsibility.
The lack of laws and regulations, as well as good administration and management, contribute to poor water governance. In the Naranjo river basin, action was taken to implement IWRM after initiatives stemming from individuals with personal conviction of its importance. This has led to the creation of some formal legislation and the process of implementing IWRM. This consequently illustrates the potential important role of individuals in driving policy change.
The Lake Atitlán basin experiences serious problems of water pollution, soil erosion and forest and biodiversity losses. Action was taken to establish the Authority for the Sustainable Management of the Atitlán Basin. However, barriers such as lack of public participation, institutional coordination and investment funds have only ensured limited success. The key lesson learnt is that the main barriers to an integrated management of water resources in the basin are strongly interlinked.
A large proportion of Brazil’s population is lacking access to water and sanitation, and development is slow, in particular in rural areas due to lack of funds and political will, but also due to inefficiency in the resources allocation. Action has been taken by the State of Ceará to implement the model called Integrated Rural Water Supply and Sanitation System, illustrating that the most important component of attaining sustainable management is user participation.
The Toledo River basin is increasingly contaminated due to unsustainable agricultural practices, Action was taken through a UNESCO-IHP project aiming to perform an integrated environmental assessment of agricultural and farming production systems located in the Toledo River Basin. By using a multi-criteria approach, it was possible to highlight the interactions and use of natural capital, human-driven resources, and ecosystem services supporting agricultural and farming production systems.
The water resources of Brazil are subjected to pollution and mismanagement. Furthermore, it is susceptible to urban flooding and land-slides. To address these issues, action was taken to increase funding to the National Water Agency. In terms of IWRM, the key lesson learnt is the need for strong and well-funded executive agencies capable of putting laws into practice.
The lowland valley of Chancay-Lambayeque watershed is scarce of water resources, forcing farmers to irrigate with insufficiently treated waste water, resulting in severe health issues. Action was taken through the project “Future Development of San José farmer community: Wastewater” which was a collaboration between the private and the public sectors, aiming to illustrate alternative ways to irrigate. The most important lesson is that cooperation is an important instrument for development.