Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Estimation


Evaluation of Total Demand For Al-Hussainiyah Irrigation Project Using Geomatics Techniques

Abdul Razzak T. Ziboon; Mahmoud S. Mahdi; Hanan Kadhum

Engineering and Technology Journal, 2016, Volume 34, Issue 9, Pages 1715-1730
DOI: 10.30684/etj.34.9A.1

In this paper, the crop water requirement was calculated using two methods; the first method is FAO-56-Penman Monteith. While the second method, is the Penman Monteithutilizingsatellite image data where the Landsat 5 TM image is used in this method. The estimated ETCusing these two methods wasof equal value,5.20 mm/sec.This verifies the use of this satellite image for estimation of ETC. The agricultural situation and water demand of each canal and the corresponding cultivated area were evaluated.This evaluation shows that
Al-HussainiyahCanal has the highest value of discharge (12.43 m3/sec) with maximum cultivated area (89.82 km2). The Al-ajmea Canal has the lowest discharge rate of (0.25 m3/sec), with minimum cultivated area of (0.39 km2).These canals operate under half of their design discharge and the cultivated area for this project distributed mainly along the main canals. Evaluation of the water use efficiency (WUE)of the project shows that the maximum value of the estimated WUE was at Al-kamalea canal 7.9 km2/m3/sec. While the minimum value was at Al-ajmea canal 1.6 km2/m3/sec. The average WUE for the area of study was 7.2 km2/m3/sec, which is equal to the WUE ofAl-HuassainiyahCanal.It has been proven that the Landsat 5 TM image can be effectively used in monitoring irrigation network, especially when considering large areas. It can be used for estimating and evaluating the water consumption and the water use efficiency of the irrigation projects in Iraq.

Optimization of the Time Required for Determination of the Total Dissolved Salts in Soil

Mohammed Y. Fattah; Maysam Th. Al-Hadidi; Baqer A. Ali

Engineering and Technology Journal, 2014, Volume 32, Issue 13, Pages 3272-3283
DOI: 10.30684/etj.32.13A.17

The purpose of this paper is to determine the shorter time required for proper determination of the total dissolved salts in soil. The usual test takes 3 to 4 days to measure the total dissolved salts in the sample. Eighteen samples were gathered from different sites in Baghdad city. The physical properties were determined experimentally. The testing program was done by two stages; the first stage included measurement of ordinary T.D.S (series A) while the other stages included measurement of the magnitude of total dissolved salts at different times.
It was found that after 24 hours of soaking the soil in distilled water, the total dissolved salts will reach about 95 % of the actual amount (after 3 days). The usual procedure takes at lest three to four days which is very long time if there is no time or conductivity device. Therefore, a proposed procedure is submitted to estimate the T.D.S. after 24 hours which revealed very good agreement with the actual values. The results of T.D.S. measured after 24 hour give a suitable compatibility with those measured by the ordinary method after 3 days where the coefficient of determination R2 equals (0.918). An expression was determined which can be used to estimate the T.D.S. from values measured after 24 hours only.