This paper presents new valuable field data and a comprehensive approach to the determination of the rock mass classification and tunnel support systems for tunnels in unconsolidated sedimentary rocks as a special soil condition. The main objective of this study is to investigate and present the characteristics of the unconsolidated sedimentary rock by using the point load tests and slake durab...

This paper presents the torrential environment of the torrents of the area of the prefecture of Drama. Firstly, the torrents of the area and their morphometrical and hydrological characteristics are imprinted. At the same time, the torrential environment (potential) is specified with the analysis of the basic torrential factors (climate, relief, geological base, vegetation). After that takes pl...

In the arid and semiarid environments of the world, microhabitats serve as models for the structure of vegetation communities. The goal of this study was to identify differences in the structures of the herbaceous communities growing on a crystalline substrate and those growing on a sedimentary substrate in a semiarid region of northeastern Brazil. One hundred 1 × 1 m plots were established in ...