(e.g., the role of environmental education in primary and secondary school, as example). Taking the above principles into account, the BAU and an Environmental Policy scenario were developed to demonstrate the utility of the WEAP model as a tool for integrated water resources management, and are summarized in Fig.5. Illustrative Water Management Policy Scenario Regional Environmental Conservation 1. Double the instream flow requirement below the Petchaburi River to maintain higher flows down river. 2. Do not allow Khangkachan Reservoir to fall below a minimum height. 3. Ensure groundwater levels do not fall below minimum threshold to reduce salinity threat. BAU Scenario – Assumptions 1. Without Climate Change: Historical climate repeats BAU Scenario - Assumptions 1. With Future Climate Change (RCP4.5 and RCP8.5). 2. Regional population and tourism grows by UN estimate, with a growth rate of less than 1%. 3. Minimum flow requirements below the Petraburi Dam Diversion have highest priority. 4. Irrigated agriculture and municipal water supplies to Eastern region have equal priority, but secondary to Petchaburi river. 5. Irrigation preference is first from Petchaburi canal, then groundwater, and finally local sources. 6. Hydropower is a secondary benefit (serves agriculture and flood protection). 7. Irrigators closer to the canal source possess a "Positional Advantage" to the canal water 8. A minimum canal flow of 1.5 cms to the Southern Region must be met. Fig.5 Baseline assumptions and two select, future water management policy scenarios The BAU scenario assumes current water use and supply sources continue along the same trajectory that includes regional population growth and tourism visit estimates, while the land in agriculture and the current infrastructure and their operations remain the same. Water use per-capita also remains constant throughout the future period, which have considered to be 2020 through 2040 for this analysis. The policy scenario that we have developed for this report focuses on environmental enhancement of the Phetchaburi river system. Ideally, policy scenarios would be developed within a participatory environment that would gather input from stakeholders in an iterative fashion. Unfortunately, this brief project did not have the benefit of such direct input. The Environmental scenario that was developed, looks to enhance the environmental flows of the Phetchaburi river, recognizing that more than 60% of the flow at the Phetchaburi dam is annually diverted primarily to serve irrigated agricultural interests. 246 Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals (SDGs): Policy and Practice 27-29 June 2016, Cha-am, Phetchaburi, Thailand
Proceedings of International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals : Policy and Practice 27-29 June 2016 at the Sirindhorn International Environmental Park, Cha-am, Phetchaburi, Thailand
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