RISCURI CONDIŢIONATE DE EXCESUL DE UMIDITATE ÎN CONTEXTUL DEZVOLTĂRII DURABILE A TERITORIULUI AGRICOL DIN PARTEA DE SUD-VEST A ROMÂNIEI
ABSTRACT. - Risks Conditioned by the Humidity Excess in the Context of Sustainable Development of the Agricultural Territory in the South-Western Romania. In order to make an accurate dimensioning of the melioration tillage’s fighting against water logging there have been identified some areas with low permeable soils, natural or anthropicaly compaction and the resources of water which give birth to the excess. According to on the existent meliorative actions there have been proposed new interventions which should bring the soils back to their superior fertility potential. The researches performed on a certain area of 1,198,264 ha, representing the cultivated land of the Banat province, were made in following stages: a) studies of the ground for the identification and cartography of the soil conditions and for the investigation of natural conditions; b) analytical laboratory determinations on representative soil samples; c) the taking of a legend of the soil and ground units which included 292 divisions, each division being characterised by 72 synthetic indicators of environment and soil; d) by plotting there were established the expansion areas for each ground and soil unite) the final stage consisted of computer processing of more than 20,000 coefficients, in accordance with a standardised methodology and some specific schedules. The intensity of limitations and degradations was analysed for each limitative, establishing: 1. no limitations; 2. reduced limitations; 3. moderate limitations; 4. severe limitations; 5. very severe limitations; 6. extremely severe limitations, as it follows: - excess of phreatic humidity: 1= 65,51%; 2 = 17,61%; 3 = 14,72%; 4 = 1,96%; 5 = 0,21%; - excess of stagnic humidity: 1 = 62,70%; 2 = 13,98%; 3 = 10,08%; 4 = 13,22%; 6. = 0,02%; - excess of flood humidity: 1 = 93,9%; 5 = 4,36%; - excess of humidity due to the lateral infiltrations in soil, on the slopes: 1 = 88,46%; 2 = 8,68%; 3 = 1,69%; 4 = 0,96%; 6 = 0,21%.
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