Design Of Irrigation And Drainage Minor Network In The Gavshan D1, D2, B3 And B4 Units

Narrative Description of Project

Gavshan irrigation and drainage network is located on the Sanandaj-Kamyaran road in the kermanshah province. Irrigation and drainage network are consists of the nine (9) development units that are located in the miandarband&bilevar plains. Irrigation network is included the main, primary and secondarycanals that all of them have been built. The aims of this projectaredesign of minor irrigation network in development units(B3-B4-D1 & D2)inthe Bilevar&Miandarband plains for the best using of water & land resources and the modern irrigation systems. The gross of network area are about 10,000 ha.The climate of study area is cold& semi-humid and average ofannual precipitation is about 594 mm.Quality of water used is suitable and the soil texture is medium to heavy. In order to using of allocated water resources fromGavshan dam, The design was carried outfor changing gravity irrigation method to sprinkler irrigation-Classic Fix (portable sprinklers). Also, pressure supply for the purpose plains was conducted by designing on-farm &Centralizedpumping stations.

Description of actual services provided by your staff within the assignment

• Review of previous studies for Gavshan irrigation and drainage network
• Review of cropping pattern, water requirement and the changing gravity irrigation method to sprinkler irrigation
• Design and preparation of drawing maps for the pumping stations with the following characteristics:

Type of Pumping station number Dynamic pressure (m) Capacity (Lit/s)
On-farm 51 60 100
Centralized 2 60-135 1000
• Design and preparation of drawing maps for the tertiary & on-farm pipelines with the following characteristics:
Type of Pipeline Length of pipeline (Km) Diameter (mm)
Tertiary 557 160-355
On-farm 2948 32-75
• Preparation of BOQ, Cost Estimation and Tender Documents.
Reports on the contract are prepared as follows:
• Monthly progress reports
• Design of basic report
• Principles of designing report
• Final technical report
• O & M manual for the pressurized irrigation &drainage network