DEVELOPMENT, CALIBRATION AND VALIDATION OF A MACRO - CATCHMENT RAIN WATER HARVESTING MODEL: OVER....

Rainwater harvesting (RWH) has become a vital method of water conservation around the world. RWH's success hinges on effective design based on precise hydrological modelling. RWH are rare and site specific models built specifically for macro catchments. As a result, this study focuses on the construction, calibration, and validation of a Macro catchment RWH in semi-arid Tanzanian areas with inadequate hydrological data. The Parched Thirst (PT) rainwater collecting model for micro catchment systems was modified to create the macro catchment model. Newcastle upon Tyne University did conceptual model modelling, coding, and performance testing. Calibration and validation were carried out in the Mwembe – Makanya watershed in Kilimanjaro's Same District. For runoff generation, two experimental models were set up, and data was collected from each site for two wet seasons. The model was validated using three tests: total monthly runoff, seasonal runoff, and runoff volume for single and large storms over a two-year period. The model was able to replicate macro catchment rainwater harvesting on slopes ranging from 3 to 15%, and validation findings revealed a significant correlation between observed and simulated runoff during the lengthy rainy season (R2 0.98). The work was successful in establishing a boundary scenario that can aid in the validation of runoff simulations in ungauged catchments. Runoff generation and routing were included in the macro catchment RWH system model. With the routing component, the model could now simulate runoff in huge catchments. In order to simulate runoff from large catchments, the Parched Thirst (PT) model for macro catchments might be utilised. The approach can also be applied to water resource planning in other industries that need the estimation of long-term runoff records.

Please see the link :- https://www.ikprress.org/index.php/JOGEE/article/view/160