Research Journal of Agricultural Science, Vol. 41 (2), 2009 56 LAND RECLAMATION ARRANGEMENTS IMPACT IN SOILS EVOLUTION FOR HYDROGRAPHIC BASIN OF THE RIVER BEGA. IMPACTUL LUCRĂRILOR DE ÎMBUNĂTĂŢIRI FUNCIARE ASUPRA EVOLUŢIEI SOLURILOR DIN BAZINUL HIDROGRAFIC BEGA Ioana Alina COSTESCU, Nicoleta NEMEŞ Politehnica University From Timişoara, Hydrotechnical Engineering Faculty Corresponding author: G. Enescu Street No. 1A Timişoara, e-mail:ioanafair@yahoo.com Abstract: Soil and vegetation constitutes a system that is appreciated in consideration with the quantity of biomass accumulated. The natural conditions that favour the geo-dynamical phenomena are represented by a series of geological, geo-morphological, hydrographical, climatically factors that act together over the systems components. The land slip processes stabilised or semi stabilised, affect a considering part of the agrarian surface, especially grass lands which constitutes a severe soil degradation processes. Surface erosion affects all hydrographical basins in our county due to the natural factors but especially because of the negative long-term influence of the anthropic component. Simultaneously deep erosion affected surfaces are the one where the released factors is combined with the important potential factors, high slopes and the lack of protection from shrubby vegetation. In the hilly area the land slips have immediate and negative consequences over the agrarian terrains, communication paths, locality infrastructure. Soil pollution from anthropic activities in Timiş County is caused mainly by the improper depositing of industrial, domestically and animal wastes. Rezumat: Solul şi vegetaţia constituie un sistem a cărui depreciere a calităţii se exprimă prin cantitatea de biomasă acumulată. Condiţiile naturale care favorizează fenomenele geo-dinamice sunt reprezentate de o serie de factori de ordin geologic, geo-morfologic, hidrografic, climatic, etc., care acţionează conjugat cu ponderea diferenţiată şi care după rolul pe care îl au sunt grupaţi în factori potenţiali şi factori declanşatori. Procesele de alunecare, fie stabilizate sau semistabilizate, afectează o parte considerabilă din suprafaţa agricolă, afectând în special păşunile care constituie cele mai grave procese de degradare a solurilor. Eroziunea de suprafaţă afectează practic toate bazinele hidrografice ale judeţului datorită atât factorilor naturali dar în mod deosebit influenţei negative şi pe termen lung a factorului antropic. În zona colinară alunecările de teren au consecinţe imediate şi negative asupra terenurilor agricole, căilor de comunicaţie, infrastructurii localităţilor, etc. Poluarea solului în urma unor activităţi antropice, la nivelul judeţul Timiş, este cauzată în principal de: depozitarea necorespunzătoare a deşeurilor industriale, menajere şi dejecţii animaliere. Keywords: hydrographic basin, soil pollution, land improvements. Cuvinte cheie :bazin hidrografic, poluarea solului, îmbunătăţiri funciare INTRODUCTION The soil and vegetation are a system whose quality depreciation is expressed by the accumulated biomass quantity. The process regarding the quality of soil depreciation involves three stages:  stage I – when the main system function are normal, and the productivity variation are self-regulated, accomplishing a balance estate (climax);  stage II – when happens a disequilibrium of the main functions and through self- regulation the system is not capable to achieve the balance estate, in long term the soil quality are depreciated. The system rehabilitation can be obtained by anthropical interventions (changing the usage type, the usage structure, fertilizers appliance, works and arrangements