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Rectal prolapse and rectal intussuception correspond to two stages of the same disease. Rectal prolapse is unusual but requires surgical treatment. Abdominal rectopexy is the most effective procedure but increases the risk of postoperative constipation. This risk decreases when the lateral sides are not touched during rectal dissection. The Delorme procedure is associated with a higher rate of recurrence and must be reserved for patients presenting a high risk of postoperative complications. Rectal intussuception is more frequent and is pathological only when arising in the anal sphincter. Rectal intussuception may lead to solitary rectal ulcer and has in this case to be treated by rectopexy. Rectal intussuception involvement in terminal constipation is not yet proved. Internal mucosectomy seems to be the best treatment for terminal constipation.

This paper highlights the results of a research on hydric processes in different forest systems to evaluate the effectiveness on sail conservation. Reafforestations of pine (P. laricio Poir.) and ook coppices (Q. pubescens Willd. and Q. frainetto Ten.) where chosen becau.se they are representative of conditions throughout the Mediterranean area. The intrerception, which is a function of the forest cover, is a significant factor in the hydrological balance and represents a variable fraction of the occurent rainfall while the stemf1ow represents a small fraction of the precipitation. In the pine ,stands rainfall did not cause any runoff. This was both because of the crown interception and the infiltration in the soil. It was, moreover possible to confirm that the reduction of density did not substantially modify the hydrological balance.