The involvement of the institute "Jaroslav Černi" in the embankment area of HPP Djerdap has been going on incessantly since the time when designed HP "Djerdap I" during sixties. At that time significant terrain examinations, model researches and studies were carried out as well as calculations executed by the original methodologies designed in the institute. On the basis of those investigations the structure of the dam was designed and put up. It was followed by the completion of exhaustive works on embankment protection and preclusion of adverse effects. Some of the tasks performed in the institute are perennial while the others are realized when needed, sorting out the concrete problems.

The realization of the Program for monitoring, evaluation and analysis of the impact of the Danube backwater on the embankment caused by the construction and the work of HPP "Djerdap I" and HPP "Djerdap II" is of the greatest significance. Mentioned Program is multidisciplinary and consists of nine particular programs, which comprise specific aspects of the impact of the reservoir backwater on the embankment (Figure 1). The complete program for monitoring, evaluation and analysis of the impact of the backwater was designed at the Institute "Jaroslav Černi" and was verified at the seminar of Yugoslav Society for Drainage and Irrigation - Section Vojvodina held in Novi Sad in April of 1978. Since than that program has been realized continuously. Each program was designed with a possibility of being modified and eventual addition within perennial implementation. A compendium of prime activities according to specific programs is given in a follow-up.

Program I - Monitoring surface water regime

	Observation of the water levels
	Measurement of discharges
	Determination of the discharges on the specific section of the reservoir
	Comparison between realized and designed backwater regime

Program II - Monitoring groundwater regime and drainage system activity

	Observation of the groundwater levels at existing points
	Monitoring drainage systems' working regime
	Determination of the parameters of the groundwater quality at the chosen points
	Definition of the groundwater regime and drainage system effects

Programs III and IIIa - Monitoring sediment regime and changes in morphology

	Measurement of concentration of suspended sediment
	Complete hydrometric measurements of water and sediment
	Determination of the balance of sediment in the reservoir
	Determination of the extent of siltation of the sediment in the reservoir by recording permanent sections of the reservoir and sediment balance calculation

Program IV - Monitoring ice regime

	Observations, measurements and monitoring of condition and amount of ice in the Danube and its tributaries
	Analyses with proposal for optimal measures of monitoring occurrences of ice and directed work of HPP Djerdap I

Program V - Monitoring water-salt regime and HPP Djerdap I backwater impact on agricultural production

	Monitoring the state, conditions and changes in agricultural soil and production
	Analysis of water-salt regime of soil in the embankment area of HPP Djerdap
	Evaluation of water and salt regime by application of chosen method consisted of hydrodynamic and other calculations with a proposal for additional researches and measures against adverse effects

Program VI - Forests in forelands

	Formation of bio-ecological sections
	Measurements of hydropedological properties on bio-ecological sections
	Analysis of hydrological and meteorological conditions on bio-ecological sections
	Analysis of yield as a basis for evaluation of possibility of survival and development of forests in conditions of flooding

Program VII - Stability of levees

	Terrain identification of the state of defense line along the reservoir
	Description and analysis of condition of defense line on the basis of insight in-situ and relevant data processing

Program VII - The quality of water in the Danube

	Determination of parameters of the quality of water in the Danube on specific sections
	Definition of changes in the quality of water in the reservoir during a period between two measurements

Program IX - Monitoring and analysis of stability of the slopes and slants

	Completion of the maps of occurrences (instability and conditional stability) on the slopes of reservoirs
	Geodetic survey on chosen instable sections
	Completion of the monitoring project

The purpose of these monitoring, measurements and analyses is to enable adequate and timely intervence as well as to provide the base for undertaking the measures against drawbacks concerning function of protection systems. Furthermore, the results gained through realization of mentioned program stand for the basis of vocational advisement regarding the influence of HPP Djerdap work on watercourses and embankment, as well as for getting the necessary water management authorization and working licence.

Beside the mentioned activities within the "Program for monitoring, measurement and analysis of the Danube backwater impact on the embankment area caused by the construction and the work of HPP "Djerdap I" and HPP "Djerdap II" Institute for the Development of Water Resources "Jaroslav Černi" has always been engaged in numerous particular problems in the embankment area caused by inadvertent effects of the backwater of the Danube.

Institute for the development of water resources "Jaroslav Černi", 2001.