Study of Potentiality of Rainwater Harvesting As a climate Change Adaptation 2016 Government of Nepal Ministry of Water Supply & Sanitation Department of Water Supply & Sewerage Water supply & Sanitation Division Office, Arghakhanchi Study of Potentiality of Rainwater Harvesting System as a Climate Change Adaptation Option in Arghamaidan, Arghakhanchi district Nov 15, 2016 Submitted by: Water Supply & Sanitation Division office, Arghakhanchi Tel.: 077420110 Email:[email protected], 1 WSSDO,Arghakhanchi Study of Potentiality of Rainwater Harvesting As a climate Change Adaptation 2016 Contents List of Figures .......................................................................................................................................... 4 List of Tables ........................................................................................................................................... 4 ACRONYMS AND ABBREVIATIONS .......................................................................................................... 5 EXECUTIVE SUMMARY ............................................................................................................................ 6 1. GENERAL INFORMATION .................................................................................................................... 8 1.1 Introduction .................................................................................................................................. 8 1.2 Project Background ....................................................................................................................... 9 2. METHODOLOGY ................................................................................................................................ 9 2.1 Literature Review .............................................................................................................................. 9 2.2Reconnaissance visit & Stakeholder Consultations ....................................................................... 9 2.2 Data Collection& Processing ....................................................................................................... 10 2.3 Site Verification from district level ............................................................................................. 10 2.4 Site Investigations ....................................................................................................................... 11 2.5 Mapping ...................................................................................................................................... 12 2.6 Water Resources ......................................................................................................................... 12 3. PROJECT AREA ................................................................................................................................... 13 3.1 Project Location .......................................................................................................................... 13 3.2 Households and population ........................................................................................................ 13 3.3 Migration ..................................................................................................................................... 13 3.4 Land Use/Land Cover .................................................................................................................. 13 3.5 Rain fall& Temperature ............................................................................................................... 14 3.6 Access to markets ....................................................................................................................... 15 3.7 Gender and Social Inclusion ........................................................................................................ 15 3.8 Irrigation Facilities ....................................................................................................................... 15 3.9 Water supply for Domestic use and Livestock ............................................................................ 16 3.9.1 Access to Water: .................................................................................................................. 16 3.9.2 Technical and Financial Support for drinking water infrastructure and irrigation .............. 16 3.9.3 Demand and Supply ............................................................................................................. 16 4. PROPOSED PROJECT .......................................................................................................................... 16 4.1 Project Objectives ....................................................................................................................... 16 4.2 Proposed Major activities ........................................................................................................... 18 2 WSSDO,Arghakhanchi Study of Potentiality of Rainwater Harvesting As a climate Change Adaptation 2016 4.3 Protection of the area surrounding the water source ................................................................ 18 4.4 Treatment of Catchment Land .................................................................................................... 19 4.5 Community participation ............................................................................................................ 19 4.5.1 Watershed Management & Development Committee ....................................................... 19 4.5.2 V-WASH-CC .......................................................................................................................... 19 4.6 Gender Inclusion ......................................................................................................................... 20 4.7 Institutional Support ................................................................................................................... 20 4.8 Environmental Assessment ......................................................................................................... 20 4.9 Implementation Schedule ........................................................................................................... 20 5. ESTIMATED BENEFITS ........................................................................................................................ 21 6. COST ESTIMATE ................................................................................................................................. 22 7. RISKS .................................................................................................................................................. 22 8. FINDINGS and CONCLUSION ............................................................................................................. 23 REFERENCES .......................................................................................................................................... 24 3 WSSDO,Arghakhanchi Study of Potentiality of Rainwater Harvesting As a climate Change Adaptation 2016 List of Figures Figure 1: Reconnaissance at Arghamaidan ............................................................................................. 9 Figure 2: Dharampanimul ....................................................................................................................... 9 Figure 3: Dhobata Muhan ..................................................................................................................... 10 Fig 4: Catchment for Dhobata Source ................................................................................................... 11 Fig 6: Rani Daha (800m3 ....................................................................................................................... 11 Fig 5: Catchment for Ranidaha .............................................................................................................. 11 Fig: 7Geology......................................................................................................................................... 12 Figure 8: Study Area .............................................................................................................................. 12 Fig. 9: Land use/Land cover of project area .......................................................................................... 13 Figure 10: Seasonal contribution of Precipitation ................................................................................ 14 Figure 11: Mean Monsoon precipitation variation over Nepal ............................................................ 14 Figure 12: Mean Monsoon Maximum air temperature variation over Nepal ...................................... 15 Fig 13: Recharge ponds & pits............................................................................................................... 16 Fig. 14: Filled recharge ponds and pits from storm run off .................................................................. 17 Fig. 15: Traditional Spring Source ......................................................................................................... 17 Fig. 16: Improved Water Availability ..................................................................................................... 17 Fig. 17: Catchment Protection .............................................................................................................. 18 Fig. 18: