Mathematical Simulation of Agriculture Drainage Water Quality and Quantity and its Effect on El-Nobaria canal

Sherif Hassanin, Alaa El-Sadek

Thursday 2 july 2015

12:00 - 12:15h at Asia (level 0)

Themes: (T) Hydro-environment, (ST) Impacts of pollutants on the water environment

Parallel session: 11G. Environment - Impact

El-Nobaria canal irrigates 1.076*106 feddans, in which eight potable water intakes take their water from it which suffers from pollution by agriculture drainage water at seven locations. A 59% of such drainage water (DW) is coming from ElNasr-3 main drain which tends to cause a deterioration of El-Nobaria canal water quality downstream its outfall feeding all intakes (seven potable intakes and several branches) locating downstream km (52,960) on El-Nobaria canal. The DRAINMOD/ DRAINMOD-N/ DRAINMOD-S models have been tested at the field/field block scale using the field data of 2006/07 and 2007/08 to simulate outflow discharge, salinity and nutrient load at catchment’s agricultural outlets of El-Delengat Extension drain, El-Bostan drain, ElNasr-3 main drain, and ElNasr-1 drain. Five measures are used to justify precision of the simulation results. A surface water quality model, QUAL2K, has been calibrated and validated on El-Nobaria canal according to the field data during summer 2007 & winter 2008, respectively. The study concentrated on salinity (TDS), nitrate-nitrogen (NO3-N), and TN. The water quality of El-Nobaria canal was investigated to estimate the impact of drain discharged on its quality. A proposed drainage reuse scenario is presented in this study to improve the water quality in El-Nobaria canal and its branches especially at the potable water intakes.