Haqqi Ismail Yasin

University of Mosul · College of Engineering

Among the factors affecting the movement of water in the soil are soil properties (structure and texture). The rate of components of soil minerals and organic material has an effect on its bulk density. As the surface soil has organic matter more than subsurface soil in general, the bulk density increases with soil depth, so the research aims to st...

This research aims to study the effect of land surface slope on the shape and size of the wetting pattern in the soil resulting from a dripping source, especially when there is a local surface runoff resulting from a water application rate higher than the soil infiltration capacity. As a result, it leads to a noticeable displacement of the center o...

The research included studying the effect of each of the size of catch cans and the spacing between them on the calculation of water distribution uniformity coefficient and with different spacing between sprinklers and for several sprinklers heads, The research included conducting 10 tests, each test of a different sprinkler head, which included fi...

The research aims to study the characteristics of each of the infiltration depth, wetting front depth and the initial moisture of the soil in the case intermittent ponding depths using successive cycles for distribution and redistribution patterns with different durations. Six laboratory experiments were conducted for cylindrical infiltration under...

The research included studying the effect of the slope of soil surface on water distribution uniformity of stationary sprinkler systems. 30 tests were conducted to obtain the pattern of water distribution along the radius of the wetting circle, where the sprinkler at the center, using 6 different sprinklers heads. In addition, different slopes of t...

The research aims to study the effect of some physical properties of the soil as soil components of sand, silt, and clay, as well as bulk density, and the initial soil moisture, on both cumulative infiltration depth, infiltration rate, and basic infiltration rate. Depending on data of 31 laboratory infiltration tests represented by 516 values for c...

Among the operating and management practices that can increase the uniformity of water distribution in the portable sprinkler irrigation systems is the alternate setting of sprinkler laterals. Shifting the laterals by half the distance between laterals results in a single alternate set and shifting the laterals by half the distance between the spri...

The aim of this research is to study the effect of intermittent water application on the wetting pattern and soil moisture distribution for homogeneous and layered soils under trickle source. Thirty experiments were conducted to monitor the advance of the wetting front in the soil profiles. Measurements of soil moisture content were also made at se...

Average daily data of solar radiation, relative humidity, wind speed and air temperature from 1980 to 2008 are used to estimate the daily reference evapotranspiration in the Mosul City, North of Iraq. ETo calculator software with the Penman Monteith method standardized by the Food and Agriculture Organization is used for calculations. Further, a no...

The present research included studying the effect of the sprinkler nozzle angle and cyclic variation of the operating pressure head on the uniformity of water distribution for many sprinkler heads spacing with rectangular and triangular sprinkler heads arrangement for different sprinkler heads. The research conducted 40 tests to measure a single sp...

Depending on the production function, irrigation water cost function and the sale price of yield, previously, lengthy mathematical expressions have been developed to estimate the optimal levels of water used in deficit irrigation, that would maximize yield (W m), under water limiting (W w), and under land limiting (W l) and the amount of water that...

18 tests were carried out to obtain the water distribution pattern for single sprinkler head under different pressure heads and five different type sprinklers to express the water distribution pattern for single sprinkler by estimation equations as a function of distance from the sprinkler and the pressure head. The friction loss head of lateral pi...

Drip irrigation is one of the most important irrigation systems that reduce the losses of deep percolation and evaporation by applying water only for a certain amount of soil , Knowing this amount is essential requirement for optimal design and management of drip irrigation systems. To estimate a dimensions of the wetted soil under two dimensions o...

This study used the definitions of irrigation systems evaluation parameters: application efficiency; application adequacy and application uniformity, in addition to the storage efficiency, the deficit coefficient and deep percolation losses. It was adopted the linear distribution of the infiltration depths for cases that intersects the line of the...

The present study proposed a new single shape factor to be used in volumetric balance equation. The new single shape factor combines the surface shape factor (0.77) and the subsurface shape factor (Kiefer factor) in one shape factor. By depending on hypothetical design factors: border length, border slope, inflow rate per unit width of border, mann...

The present study aims to find out the einterferences effects of the soil surface slope, the water application rate, soil type, and the initial soil moisture on the local surface runoff, which is resulting from the application of certain water volume by trickle line source. In addition to determining the maximum applicable value for each of the abo...

0 , % 3.75 , % 7.5 , % 15 3.03 , 5.06 ABSTRACT The soil wetting pattern under the trickle source be affected by several factors, and these factors are the soil surface slope, water application rate, soil type, and the initial soil moisture content. The aim of the study is to find out the einterferences effects of the above factors on displacement o...

Initial water content is one of the basic factors affecting the process of water infiltration into soil. The present study aimed towards estimating infiltration data for different initial water content for soil, depending on Kostiakov equation and basic infiltration rate with initial and saturated water content of soil. The study included collectio...

The performance of irrigation systems can be evaluated by criteria which show the efficient use of on-farm water distribution. The different distribution of infiltration depths in the soil may give the same value of application uniformity coefficient; therefore the present study considered the distribution uniformity coefficient of the useful infil...

Under drip irrigation , the plant's root is concentrated inside the wetted bulb (region). Thus, the development of these roots and the plant production are greatly affected by the wetting pattern. Therefore, the wetting pattern of soil under drip irrigation must be taken into consideration in the design of drip irrigation system for both single dri...

The movement of water in the soil are affected by many factors including: the soil structure and texture, the flow rate , the volume of application water ,application method (continuous or intermittent), initial water content of the soil, and temperature of water and soil. The compression or tilling the soil, whether surface or sub-surface will lea...

The soil wetting pattern under trickle developed from water movement in wetting phase and redistribution phase. The present study included estimating equations for wetting pattern vertical advance and horizontal advance during the redistribution phase. This estimation is a function of time from the beginning of water application, total application...

An implicit computerized method for evaluating the parameters of the water advance function (x=a tb) in graded border irrigation has been presented based on the concept of water volume balance and the two points method. The parameters (a) and (b) have been evaluated for different combination cases of border length, inflow rate, and slope to study t...

Infiltration has been expressed by many equations and mathematical models which are based on numerical, physical, and empirical models. The empirical models are the most popular due to their simplicity. Kostiakov’s empirical equation for ponding infiltration is widely used. Its coefficients can be easily determined by using the cylinder infiltratio...

The paper included a study of wind (speed & direction) effects on sprinkler water distribution uniformity by evaluating the field distribution pattern for different sprinkler spacing for single and several irrigation. Data of single sprinkler water distribution pattern tests under different wind conditions are used in the analysis. The study showed...

The hydraulics of flow and intake phenomena in furrow irrigation are very complex due to the geometrical shape of furrow cross section. In addition, the water flow in the furrow is a case of unsteady and nonuniform flow. Several investigations have attempted to develop ways and concepts for simplifying this situation to suit the practical requireme...