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Published in:

Volume 9 Issue 12
December-2022
eISSN: 2349-5162

UGC and ISSN approved 7.95 impact factor UGC Approved Journal no 63975

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Published Paper ID:
JETIR2212412


Registration ID:
501235

Page Number

e94-e103

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Title

Modeling physical flows in the Kasai subbasin, a particular case of the Congo River Basin in Central Africa by the Curve Number method.

Abstract

Confronted with several problems related to the contributions and transport of solid sediments and materials in suspension, the Kasai River, which constitutes a navigable way ensuring the connection between Kinshasa, the Capital, and the extreme back of the country, currently requires the realization of a hydrological model. This model will be a precious tool to apprehend the various scientific problems related to the management of water resources. Integrated Water Resource Management (IWRM) is part of this and watershed studies are the basis for it. Therefore, in order to help managers and decision makers in its governance and in making good decisions, this research aims at building and calibrating a tool for surface waters in a case study representative of large river basins such as this one, a particular case of the large Congo River basin. This is one of the largest sub-basins and is located much more in the DRC with a small portion in the southwest bordering the northern part of Angola. It occupies 28% as a whole and discharges an average annual flow of about 9873 m³/s into the river. This research is based on the Curve Number (CN) method, implemented on SWAT and QGIS (QSWAT) software in the determination of water flows from measurements of physiographic data (DTM, Soil Type, Land Occupancy) produced by raster images, hydrometric and meteorological (Precipitation, temperatures, solar radiation, relative humidity, wind speeds) downloaded in Global Weather Data for Swat (GWD). These data are collected from international public databases (FAO software), satellite images (downloaded from Cgiar.org) and ground observations (hydrometric data for the period 1989 -2019) that were confirmed by observations made in an ADCP campaign in 2018. A division of 27 Sub-basins ranging from 1 km2 to 8886 Km2 with a total of 748 HRUs for its best discretization. The model was run for a period of 5 years (2008 - 2013).its construction allowed us to simulate monthly flows with a global coefficient of determination (R²) evaluated at 0.9 and that of Nash-Sutcliffe Efficiency (NSE) at 0.88 after calibration. It is shown that the most influential parameters on model performance are i) Curve Number(CN); ii) groundwater base flow alpha (Alpha_BF.gw); iii) groundwater long time (Gw_Delay); and iv) threshold depth of water in the shallow aquifer required for return flow to occur (GWQMN.gw). The precipitation parameter has a great influence on the performance of this model due to its location in the equatorial zone.

Key Words

Modeling, Kasai sub-basin, curve-Number(CN), Calibration, IWRM

Cite This Article

"Modeling physical flows in the Kasai subbasin, a particular case of the Congo River Basin in Central Africa by the Curve Number method.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 12, page no.e94-e103, December-2022, Available :http://www.jetir.org/papers/JETIR2212412.pdf

ISSN


2349-5162 | Impact Factor 7.95 Calculate by Google Scholar

An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 7.95 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator

Cite This Article

"Modeling physical flows in the Kasai subbasin, a particular case of the Congo River Basin in Central Africa by the Curve Number method.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 12, page no. ppe94-e103, December-2022, Available at : http://www.jetir.org/papers/JETIR2212412.pdf

Publication Details

Published Paper ID: JETIR2212412
Registration ID: 501235
Published In: Volume 9 | Issue 12 | Year December-2022
DOI (Digital Object Identifier): http://doi.one/10.1729/Journal.32709
Page No: e94-e103
Country: -, -, India .
Area: Engineering
ISSN Number: 2349-5162
Publisher: IJ Publication


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