In studies of irrigation and drainage projects for drainage, it is necessary to extend the data from the sampling point to the network. Therefore, based on available data from observational wells, estimating the state of hydraulic conductivity (K) in the surrounding area. The estimation process values for locations where there is no information for them based on viewing areas called wells spatial interpolation. In this study, based on data from 49 observational wells were constructed in the plains Shavoor in Khuzestan province, was generalized point data as well (Ernst), to the network. Then the accuracy of different interpolation methods were compared using scientific methods include a variety of kriging method, Thiessen and interpolation weight. Due to the geographical position coordinates observational wells, hydraulic conductivity was prepared digital map of the study area, using Civil 3D software. Spatial modeling software environment was then the Arc Gis and ArcMap. Statistical methods were used to compare with other software GS +. By drawing statistical methods and software GS + and ArcGIS ArcMAP, had the lowest error ordinary kriging process shift mode. Therefore, in this study, were used for zoning and expansion of hydraulic conductivity of ordinary Kriging interpolation method. Finally, in the research area of study in 11,500 hectares by Krynjyng conventional zoning were the three areas hydraulic conductivity with ranges 2,300 hectares less than 2 meters per day, 7900 between 2 and 3 meters per day and 1,300 hectares more 3 meters per day.According to the results, estimation of subsurface drainage Shdmhasbh are planted in three areas 50.70 and 80 m. As can be seen, if the estimate for hydraulic conductivity within the Project area, the method is invalid and an error, Perhaps increased costs due to estimation error in the drainage network designs are to be laid underground drains. پرونده مقاله

The research in the fields of irrigation and drainage network in the province Hamidieh to evaluate the performance of drainage was done in the land. For this purpose, three drainage server farm at intervals of 50, 70 and 80 meters in the area was selected. Blank observation on three drain pipes at intervals of 0.3,0.8,1.5,2.5 and 15 meters of lateral drains in the middle of the line in four rows (1/4 L, 2 / 4L, 3 / 4L and 25 meters of drain output) has been installed.After drilling, construction and equipping of wells observed three times a day, after watering irrigation, the water level in the wells was read. Sampling was conducted at each irrigation water and the electrical conductivity (EC) were measured and recorded at every turn. Discharge is also the entrance to the farm was measured in each irrigation. The average hydraulic conductivity field and in the fields as well as 0.69, 1.04 and 1.13 respectively. Drainage coefficient measured at the research farm (First farm 2.08, 2.27 and second field 2.74 third farm millimeters per day), respectively.According to the drainage and water table RGWD index was specified, desired lateral in each field, in controlling water table have performed well. In the fields of lateral discharge from 1.08 to 0.03 liters liters per second per second is variable within 8 days after irrigation and drainage water salinity is variable from 20.5 to 11.1 dS m. SEI index was negative in all three fields with average value of -1.20 in the first field, -2.50 in the second field and -2.70 in the third field. This indicates proper operation of drainage system in the salt out of the root zone. According to estimates from different formulas drainage water table level in comparison with the measured unsteady and it was concluded pig farms that The mean relative error in measuring the high water table drainage in DummFormula on the basis of the lowest relative error was. And thus measured values pig breeding farms in accordance with the formula for more. The level of 0.3 meters at a distance of around drains underground water table, water table is evident steeper slope. And this represents an increase in the hydraulic conductivity is close to underground drains.So filters are artificial drainage has good performance. RY product performance index for a 0.88 first farm, secondfarm to third farm between 0.78 and 0.83 has been estimated.The second-lowest first farm and field's relative performance. پرونده مقاله