COMPARISION BETWEEN TWO NUMERICAL MODELS FOR PREDICATION OF HYDRAULICS AND MORPHOLOGICAL CHANGES IN THE RIVER NILE (FROM KM 633 TO KM 645 UPSTREAM El-RODA GAUGE STATION)

Salama, Radwa; Elsersawy, Heba

doi:10.21608/jesaun.2020.39116.1002

COMPARISION BETWEEN TWO NUMERICAL MODELS FOR PREDICATION OF HYDRAULICS AND MORPHOLOGICAL CHANGES IN THE RIVER NILE (FROM KM 633 TO KM 645 UPSTREAM El-RODA GAUGE STATION)

Document Type : Technical paper

Authors

Radwa Salama ¹
Heba elsersawy ²

¹ Nile Research Institute ,El Kanater Elkhairria,Cairo.

² Nile Research Institute ,El Kanater ,Elkhairria Cairo.

10.21608/jesaun.2020.39116.1002

Abstract

The numerical models have effective and necessary tools for rivers hydrological and morphological studies. Numerical models are useful when results are required on scales applicable for hydrological and morphological changes, where velocity and water depth distributions are signiﬁcant especially in river reaches. In the present study , two well known hydraulic models are used to simulate the River Nile hydraulics and morphological changes. A sensitivity analysis is carried out for the two models to investigate the features and disadvantages of each model and give recommendations for their further applications. The performance analysis depends on field survey data and simulations. The two models are the SMS modules (FESWMS) model and the (Delft3D) model. The field data were collected for a study reach of 12 km which is located between km 633 to km 645, measured from El-Roda gauge station. The data included geometric and hydraulic data, that were gathered for calibration and validation of the models. The results indicated that both the SMS module and (Delft3D) model predicted the water surface elevations quite well. The sensitivity analysis showed that (Delft3D) model was more logical to mesh resolution than the SMS module and SMS model presented a better fit for the hydraulic variables. However, Delft3D presented a better fit for velocity and morphological changes.

Keywords

Main Subjects

Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.

References

[1] Gezahegn, H.,( 2008).“Comparison Of 2D Hydrodynamic Models In River Reaches Of Ecological Importance: Hydro - AS-2D and SRH-W,”WAREM Univ.Stuttgart Auslandsorientierter, p. 96.

[2] Ali, A.,( 2007). “Utilizing Sedimentation Deflector System For Reducing Sedimentation At El-Kurimat Power Station Intake, Egypt,” Elev. Int. Water Technol. Conf. IWTC11 2007 Sharm El-Sheikh, Egypt, pp. 471– 485.

[3] Ahmad, P. and Simonovic, S.,( 1999). “Role Of A Coupled GIS-2-D Hydrodynamic Model In A Decision Support System for Flood Management,” Proc. CWRA Conf. Red River Flooding - Decreasing Our RisksOctober 27-28, Winnipeg, Manitoba. Hydrol.

[4] Salama, R., (2018). “Evaluation of Local Scour around Bridge Piers (Qena Bridge as A Case Study)” International Water Technology Journal, IWTJ, Vol. 8 –No.4, pp. 118–128.

[5] Leussen, V.,( 1991). “Sediment Transport Under Tidal Action,” Geo-Marine Letters, pp 119-126, Springer - Verlag, New York .

[6] Sattar, A., (2016). “Bed Morphological Changes Of The Nile River DS Major Barrages,”. Springer International Publishing Switzerland . Hdb Env Chem, DOI 10.1007/698_2016_91.

[7] Sattar, A. and Raslan, Y. ,( 2014 ) .“Predicting Morphological Changes DS New Naga-Hammadi Barrage for Extreme Nile Flood Flows : A Monte Carlo Analysis,” J. Adv. Res., vol. 5, no. 1, pp. 97–107.

[8] Foda ,A. and Sattar, A., (2013). “ Morphological Changes In River Nile at Bani-Sweif For Probable Flood Flow Releases,”. In: Proceedings Of The International Conference On Fluvial Hydraulics, RIVER FLOW 2014, Switzerland.

[9] Sattar, A., (2013) . “Using Gene Expression Programming To Determine The Impact Of Minerals On Erosion Resistance Of Selected Cohesive Egyptian Soils,”. In: Experimental and Computational Solutions Of Hydraulic Problems, Part Of The Series GeoPlanet: Earth and Planetary Sciences, pp 375–387.

[10] Sattar ,A., (2014).“Gene Expression Models For Prediction of DamBreach Parameters,”. J Hydroinf vol 16 no.3, pp. 550–571. IWA.

[11] El-Hakeem M., Sattar A., (2015). "An Entrainment Model For Non-uniform Sediment. Earth Surf. Process Landf., vol 4 no.9, pp. 1216–1226. doi:10.1002/esp.3715.

[12] U.S. Army Corps Of Engineers. (1993). “River Hydraulics.” U.S. Army Corps Of Engineers Washington, 176.

[13] Delft3D-FLOW, User Manual. 2014.

[14] Carlos, P., Roberto, M., Mauricio,T., and Nestor,J., (2005), Modelling Of Flow In a Tidal Flat Area in The South-Eastern German Bight, Die Küste, 69 PROMORPH (2005), pp. 141-174.

[15] Chai, T. and Draxler, R. (2014) ‘Root Mean Square Error (RMSE) or Mean Absolute Error (MAE) – Arguments against avoiding RMSE In The Literature’, Geoscientific Model Development, pp. 1247–1250. doi: 10.5194/gmd-7-1247.