Abstract

The results of author’s method for evaluation of water levels (and discharges) instability as the function of time are described and new Environmental Classification of water headworks is proposed, based on water flow velocity criterium and application the “instability factors†for determination save water levels elevations (and outlet works discharge conveyance capacity), accepted for design and valid for the whole project life period.

The classification is based on the assumption, that local channel processes and risks (biological, erosion, sedimentation, ice control and otherâ€s) within the environment of hydraulic works will be eliminated or negative impacts limited. The main aim of applied classification is to protect the hydrauulic water-head structures from degradation, aggradation and deterioration. The general specification for design of discharge capacity of spillways and outlet works determination are given, as well as the main principle of the investments management.

The general and particular technical requirements are specified for mitigation the negative impacts on the hydraulic headwater structures, as well as structures influences on the environment.. The scope of required changes in regulations and specifications are given to include in the present polish regulations and standards, including European EC7 Standard.