N.A. Abd Elwarth, Z.E. Ismail, M.A. El-Adl, M.M. Ibrahim
2016 Misr Journal of Agricultural Engineering  
On-farm Water Allocation Module (OFWA) in GIS-OWM Model is considered as a decision support tool for water allocation. OFWA module helps to equity on water allocation among fields by generating dynamic maps. The GIS-OWM Model conducted during (1/10/2013 to 1/10/2014) in an area located in between Dakahlia and Kafr Elsheikh governorates, with net served area of 11795 Feddans. The water allocation dynamic maps can be generated based on gross irrigation water requirements calculations. In
more » ... ations. In addition, the results indicated that, Irrigation field status dynamic maps among fields can be generated per hour during rotation ON-Times to illustrate the irrigation progress. The statistical analysis of the experimental location studies indicated that, there were a convergence between results of GIS-OWM consumed time to reach the selected gates and the actual measured time. NOMENCLATURES A f : Canal served area (feddan) D g : Gross irrigation water depth (mm) E c : Conveyance efficiency (%), GIR: Gross irrigation water requirements (m 3 ), GIR f : Gross irrigation water requirements for field (m 3 ), S: Slope of the water surface or the linear hydraulic head loss (m/m) Q f : Amount of water determined for feddan (m 3 ) Q : Water resource discharge (m 3 / sec) n: roughness and irregularities of the channel, N: Manning coefficient, T c : Time to reach a gate at the same segment (s) T g :Time to reach each gate at the network, s T f : Field's finishing irrigation time (s) T fs : Field's starting irrigation time (sec) T s : Time to reach the end of the segment (s) V: average water velocity, (m/s) V s : Water velocity through the segment (m/s), R: Hydraulic radius. 1 Agricultural Engineer in, Agric. Eng. Res. Institute (AEnRI) -El-Dokki,
doi:10.21608/mjae.2016.97957 fatcat:zfeduylynvch5n7pkr72zyhxby