- The concept of integrated water resources management (IWRM) is a holistic approach to manage the water resources. The water resources are an integral component of a social and economic good, a natural resource and the ecosystem. This research aimed to develop IWRM plan for future situation through participation of multiple stakeholder groups in Sathingphra Peninsula. The methodologies applied in this research were participatory rapid appraisal (PRA), driver-pressure-state-impact-response (DPSIR) framework, scenario planning, and logical framework. The result showed that key drivers for water resource utilization in Sathingpra Peninsula include agricultural and aquaculture intensification. Scenarios for agricultural and aquaculture development were developed. A baseline was determined to represent current situation of water and related resources. IWRM plans were developed for baseline situation and the two scenarios. A shared vision for IWRM is that By 2017 Sathingpra Peninsula will be the catchment where water resources are adequate and effectively managed towards achieving food security to meet the demands of all sectors, socio-economically, equitably, and sustainably, on the basis of appropriate participation by all parties involved.) Four programs were prepared for baseline situation include effective management of water resources, improvement/restoration of exiting water resources, irrigation system improvement, drainage and dike improvement to protect saline water. Additional programs for scenario of agricultural development were restoration and improvement of existing water resources as well as reduction of agricultural wastewater released to natural water resources. For scenario of aquaculture development, program for decreasing of aquaculture wastewater was prepared. Government organization, local administrative organisation and water-related sectors could benefit from these research findings.