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Assessment of   irrigation network in Egypt using GIS Technique (Case study: Mahmodia and Mit-Yazid Regions )

Hala M. Ebaid1*,  M. Hosny1 and T. Kotb2

1- Survey Research Institute, National Water Research Center (NWRC)

2- Planning sector ,Ministry of water resources and Irrigation(MWRI)

*[email protected]

ABSTRACT

Land surveying geographic Information system, and remote sensing were integrated to  stand for technical specifications  of about 660 long  km  of branch ,sub-branch canals, and low level meskas through Mahmodia and Mit –Yazid regions in west and middle delta ,and hence apply  analysis  and decide actions needed to replace and renew the irrigation network, and rehabilitation of hydraulic structures built through these regions. A huge  surveyed data which comprises of (cross-sections of the various water channels  , deduced Longitudenal sections from cross sections points along  all the canals, reference points for important sites (bridges, canals, weirs, etc. ...), and various  surveyed water structures built on the water channels with all necessary dimensions),  all these data where processed under ArcGIS environment . A skeleton  of  a geodatabase to store the  surveyed data was constructed.  Georefrecing of the Ikonos image and  digitizing all canals  from these images were performed . All cross sections which related to every canal  were projected in one  layer . 228 canals, about 5500 cross sections , 228 longitudinal sections, 381 bench marks, and 532 water structures  were stored  with all  related descriptive data  which comprises of: : AutoCAD file, photos ,information , X,Y positions ,and description cards (about 7600 records). Many analysis have been performed to measure  and stand for  the  status and the efficient  of these canals and hydraulic structures using overlay tools, select by location, and topology roles under ArcGIS environment .Finally two  digital base maps for Mahmodia and Mit-Yazid regions were produced, to  support the  decision makers  with  accurate  and actual data in a timely manner to continuously develop and update Egypt's vast irrigation network and plan actions needed in water managements.

Key words:  Land surveying; Geographic Information System; Mahmodia and Mit –Yazid; irrigation and drainage networks; Egypt