INFLUENCE OF THE ANTHROPIC FACTOR OVER THE MODIFICATION OF GEOMETRIC AND HYDRAULIC ELEMENTS OF THE DRAINING NETWORK OF THE ROTOPĂNEȘTI-RĂDĂȘENI-FÂNTÂNA MARE SYSTEM, SUCEAVA COUNTY PUBLISHED

Oprea RADU, F. FILIPOV
The drainage-desiccation developments on the Moldova river meadows in Suceava county werebuilt for the purpose of eliminating the excess water from both the terrain's surface and from its higherlevels, origination from rainfall, ground water, from the surface flow and from the surrounding higherground. After constructing the hydro-ameliorative improvements, special attention must be given to theoperation method and to its behavior over time. By operating and using the draining network, mainlyshores erosion and bottom of canal clogging occurs, that may be caused by both natural and humanfactors. In order to determine the geometric and hydraulic parameters of the draining system, anaccurate elevation-height topographic survey was conducted by the method of radiation and levelingtraversing combined with radiations, based on which the transversal and longitudinal profiles weredrawn. The leveling survey data were gathered using an average precision Zeiss Ni-025 level and thesurveying rod with centimeter marks, and the level differences were determined bases on two levels of thesurveying instrument. Waste disposal, vegetal waste and various packaging materials thrown into thecanal, generally beside bridges, speed the process of clogging and shuttering, causing, in upriver, thedecommissioning of canals, the overflow of waters accumulated during heavy rain, the flooding of nearbyareas, and the malfunction of the desiccating- drainage network. Also, the shore erosion and canalclogging is largely influenced by the lands serviced by the canal category of use. The shore erosion andthe canal clogging is greater upon the areas used as pastures, due to a low degree of embankmentgrassing, to total lack of grassing on some sections, caused by irrational grazing and by the repeated anduncontrolled animal crossing. On arable surfaces, canals generally present well grassed embankments,fact that diminishes riverbanks erosion, yet in time, for lack of maintenance works, cause water flowslowdown and stagnation, the appearance of hydrophilic vegetation and shrubs, favoring siltsedimentation and clogging.
humidity in excess, canal clogging, geometric and hydraulic components of the drainage network.
Presentation: oral

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