This paper presents the results of research and analyzes of the effects of a drainage canal network on the water balance of southeastern Srem. The paper was derived from a doctoral thesis which contains a detailed study of key components of the water balance of southeastern Srem, including actual amounts of water removed via the drainage canal network.

Drainage system Galovica is situated in southeast Srem. It occupies the area of about 100,000 ha, it has a dense channel network of 30-40 m/ha, 2,575 constructed facilities and 11 pump stations. The main channel - Galovica is 40 km long and it is one of the basic receiving channels of the surplus internal waters from the area of southeast Srem.

The aim of this work is to show out some properties of Guyon's method for drain spacing determination in unsteady state of flow. The analysis has been carried out in the marshy gley soil of the experimental field with drain spacing of 10 m, 20 m and 30 m. The method assumed modeled dynamics of water recharge, which hasn't been observed during the experimental trial. Therefore, its application is limited.

The aim of this work is to show some properties of the application of Kraijenhoff Van de Leur-Maasland’s method for drain spacing determination in unsteady state of flow. The analysis of the method is based on data obtained from drainage field with 10 m of drain spacing which dries out eugley soil. The results of analysis show the range of method applicability as well as certain limitations in the case of non-modelled dynamics of ground water recharges.

The study demonstrates the methodological approach to the determination of the upper limit of land value and analyzes the influence of the mode of determination of the economic effect of land use and the level of ground waters on its amount. A model was developed based on the business results of an agricultural enterprise involved in a field crop/livestock production over the past few years, which had planned to erect a drainage system in order to manage the excess of water on the available land area.

The aim of this research was to figure out certain limitations of methods for drain spacing determination application in unsteady-state of flow rate to the drains in the eugley soil. The well-known Glover-Dumm method was taken in this analysis. The analysis was based on the results of drain discharge and water table depth measurements. Measurements were carried out on the experimental field.