Hydrological, psamological and pluviographical measurements in experimental watershed area in the watershed of River Topciderska (Serbia, Yugoslavia) was analyzed. Interrelations between suspended sediment concentration in streams on the one hand and runoff, rainfall, rainfall intensity and index of previous rainfall on the other hand was came from this analyze. Effects of these parameters on suspended sediment concentration was considered for a single rainfall epizode, during the period of torrential waves and as annual value. Specific coefficients (coefficient of annual rainfall structure and coefficient of annual runoff structure) were used in this paper, with help of them effects of torrential waves and intensity rainfall on average annual suspended sediment concentration were considered.

In this paper sediment production and sediment discharge and its influence on hydroenergetical potential as well as pollution of river Lim - upper flow, Montenegro (Yugoslavia), were taken into consideration. Besides of problems of sediment and water discharge protection - biological and technical measures for sanation the negative effects of erosion processes were recommended. Total annual sediment production for the river Lim - upper flow was 679,763 mE-3/year and annual sediment discharge was 312,013 mE-3/year. Such sediment (produced and discharged) has negative impact on the hydroenergetical potential and soil resources and also pollutes water with sediments and other harmful and hazardeous materials. Introduction of erosion control measures will reduce the negative effect of erosion on the tolarant level.

Redudance rivers are basic hydrographic problem in area of Radjevina. Their appearance to associate for most rivers in the confluence of Likorda river and have character of season. Using method of quantity index the rivers of this region are classified in special hydrological classes. On the basis of this typology the possible models for solution of this problem are given.

The diffusion of erosive processes in Serbia and frequency of torrential floods are the factors of degradation of environment. Communities in Serbia are obliged to make Plans for announcement of erosive regions and for protection by torrential floods on water courses out of regular system of defense. An example of Belgrade is presented in this paper, where the Plans for announcement of erosive regions and defense by torrential floods were carried out. These documents are the basis for water protection and usage of natural resources on the concept of sustainability.