Design and simulation of roadside rainwater harvesting system :

Abstract

The Uganda water supply strategy highlights rain water harvesting from various. surface conditions as a main source water supply and for small scale irrigation development at farmer's level. While ponds, dams, and In-situ water harvesting systems have been implemented, toads have Primarily been built for transportation purpose the additional benefits rain water harvesting or supplemental irrigation, groundwater recharge have not yet been explored. As is the case in the study area of this BSc. research, lack of proper integration of road construction into the broader municipal livelihoods. has resulted-in various negative impacts: soil erosion and gully formation.in cultivated land, flooding of agricultural and inhabited areas, and reduced recharge of groundwater. Piloting on the Logere-Adere-Gulu town to Aswa 1.5 Km road in the Northern Region, Uganda. This research aimed at minimizing the negative impacts of road development and maximizing the benefits. It employed both quantitative methods- modelling (HEC-HMS and Hydraulic toolbox in combination with field observation and interviews as well as discussions with diverse stakeholders. The runoff generated was estimated from the roads using HEC-HMS model. The contributions of water supplemental rainfall to enhancing productivity were investigated with crop grown around the reservoir, Field observation and interviews resulted in a better insight on how significant the negative impact of roads could be when they are not properly integrated into water supply and the overall agricultural and rural development programs. From the model simulation in every catchment the calibration results of Calculated or simulated discharge for 32.16m3/s and 426 MCM/year from 1996-2016 respectively. Simulated result for Validation period for catchment was done and from the discharge different components of the roadside rainwater harvesting were designed accordingly.