Spatially Distributed Hydrological Modelling of a Western Africa Basin

8 pages•Published: September 20, 2018

Khalidou M. Bâ, Vitali Diaz, Miguel Angel Gómez-Albores, Carlos Díaz-Delgado, Nancy Nájera-Mota, Ousmane Seidou and Febe Ortiz

Abstract

Distributed hydrological simulations aid to investigate the spatio-temporal behaviour of hydrological variables. However, data to feed hydrological models are not always available mainly due to lack of gauges or high retrieval fees. In this research, two 0.25- degree daily precipitation databases from the Tropical Rainfall Measuring Mission (TRMM) were tested to simulate daily runoff in the basin of the main Upper Niger River tributary. Precipitation data are TRMM and TRMM Real Time (RT) 3B42V7. For runoff simulation, the grid-based hydrological model CEQUEAU was chosen. To estimate the evaporation in the model, temperatures were retrieved from the third-generation reanalysis ERA-Interim. From gauges and both TRMM data, monthly basin precipitation was calculated and compared to analyse the performance of TRMM to estimate rainfall. Runoff was simulated with each of these three precipitation products. In each case, the daily ERA-Interim temperatures were used. By Nash-Sutcliffe model Efficiency (NSE) and coefficient of determination (R2), model performance was evaluated through comparison of daily discharges with simulations for both calibration and validation periods. Results show correlation of TRMM by 0.95 and TRMMRT by 0.91 with gauge data. Both TRMM products combined with ERA-Interim temperature were found suitable for daily runoff modelling with NSE >0.835 and R2 >0.872.

Keyphrases: era interim, rainfall runoff modelling, semi arid watershed, spatially distributed hydrological modelling, trmm

In: Goffredo La Loggia, Gabriele Freni, Valeria Puleo and Mauro De Marchis (editors). HIC 2018. 13th International Conference on Hydroinformatics, vol 3, pages 343-350.

Links:	https://easychair.org/publications/paper/D7rN
	https://doi.org/10.29007/1xw5

BibTeX entry

@inproceedings{HIC2018:Spatially_Distributed_Hydrological_Modelling,
  author    = {Khalidou M. Bâ and Vitali Diaz and Miguel Angel Gómez-Albores and Carlos Díaz-Delgado and Nancy Nájera-Mota and Ousmane Seidou and Febe Ortiz},
  title     = {Spatially Distributed Hydrological Modelling of a Western Africa Basin},
  booktitle = {HIC 2018. 13th International Conference on Hydroinformatics},
  editor    = {Goffredo La Loggia and Gabriele Freni and Valeria Puleo and Mauro De Marchis},
  series    = {EPiC Series in Engineering},
  volume    = {3},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2516-2330},
  url       = {/publications/paper/D7rN},
  doi       = {10.29007/1xw5},
  pages     = {343-350},
  year      = {2018}}

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