The periurban erosion in Rancharia: the space-temporal analysis and recovery proposals of gully Grito stream

This thesis aims to perform a spatial and temporal analysis of the gully of Grito Stream, located in the urban perimeter of the city of Rancharia, and present the proposals to control this peri-urban erosion. This gully presents evidence of development dating back to the 1960s, recent episodes of damage to urban infrastructure and the presence of active erosive processes at the banks. To present a geographic analysis of this case of erosion process are presented aspects of land use history in the municipality of Rancharia and physical-geographic aspects and land use changes in the watershed of the Grito Stream and in detail scale the cartographical information on the gully. In view of this case of erosive process that is perpetuated for five decades, in this thesis detailed geographic information of the gully is presented from data collected in topographic surveys with geodesic equipment. For twenty-four months, a topographic monitoring of borehole plots was carried out, where a ridge erosion greater than 1.5 m was observed in four points and an average of 0.85 m, in all the monitored plot there was a loss of 305.9 square meters of area. In relation to the erosion process control proposals, buses with plant fiber (Bambusa bambos L.) were implanted in an experimental plot with soil level monitoring by means of erosion pins, and from a comparative analysis there is a greater upper soil movement in the experimental plot without the use of buses. Based on the measurements of soil movement levels and soil density data, estimates of soil loss were presented in the experimental plots. In the area of the experimental plot with barriers native plant species were planted with the intention of contributing to the recovery of the degraded area. In this sense, based on detailed geographic information on the area degraded by the gully of the Grito Stream, the thesis aims to contribute in the planning of future measures for an effective recovery of this area in Rancharia. From the empirical proposal presented in this thesis are presented ways to rethink the philosophy of Bacon and his contributions on Geography. (AU)