Assessing the Implications of Water Harvesting Intensification on Upstream-Downstream Social-Ecological Resilience: A case study in the Lake Tana Basin Yihun Dile a,b , Raghavan Srinivasan c , Louise Karlberg b , and Johan Rockström a a Stockholm Resilience Center, Stockholm University, Stockholm, Sweden b Stockholm Environment Institute, Stockholm, Sweden c Texas A&M University, Texas, USA
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Assessing the Implications of Water Harvesting Intensification on Upstream-Downstream Social-Ecological Resilience: A case study in the Lake Tana Basin
Yihun Dilea,b, Raghavan Srinivasanc, Louise Karlbergb, and Johan Rockströma
aStockholm Resilience Center, Stockholm University, Stockholm, Sweden bStockholm Environment Institute, Stockholm, Sweden
cTexas A&M University, Texas, USA
Rationales Rainfall variability – dryspells and droughts
Dry spells Drought
Water harvesting systems can bridge this rainfall variability In-situ water harvesting Ex-situ water hatvesting ? Upstream-downstream implications
Research Area
WH suitability study Hydrological Modelling Understanding implications
Tillage operations depth of till of 15cm, and mixing efficiency of 0.3 tillage frequency of 4
Water Harvesting Implementation Scenarios First class suitability – HRUs that consist of a slope<2%, Soil: Luvisols, and Vertisols; and agricultural land. Area = 0.14km2 (1.14% of watershed) Second class suitability – HRUs of slope: <8%; Soil: Luvisols, and vertisols; and agricultural land. Area = 3.79km2 (38% of watershed) Third class suitability – HRUs of slope: <12%; soil: Luvisols, and vertisols; and agricultural land. Area = 5.07km2 (51% of watershed) Nutrient scenarios Current nutrient application rate