Some engineering factors that control groundwater level [electronic resource]

Includes bibliographic reference

The purpose of this investigation to study some engineering factors that control groundwater level. Also, to Study variations in water table depths with time in different soils and amendments to accommodate variant crops and periods in growing season. To achieve this goal, two experiments were carried out, namely: (1) a laboratory experiment by
using the soil tank model and (2) afield experiment, including utilization of rice straw as drain filling material. Three control depths were used for drainage outflow in the soil tank model, namely: (20, 12 and 4 cm from soil surface). The soil surface in the soil tank model was watered by surface irrigation, followed by draining through .drains and was measured water table level at different times. The results obtained from
model could be summarized as follows: Water table falling rate at mid point between drains increases with the drainage depth and decreases with drain-spacing for both of soil with and without of rice straw. Water table falling rate at mid-point between drains in sandy loam soil with drain of straw was much more than bare soil. Water table falling rate at
mid-point between drains in sandy soil with drain of straw was less than bare soil. Water table falling rate at mid-point between drains in clay loam soil with two drains of straw was more than one drain

Summary in Arabic