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| Author(s): |
Anna Paola Michelano Bubel
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2003-12-17 |
| Examining board members: |
Maria do Carmo Calijuri;
Raoul Henry;
Walter de Paula Lima;
David Manuel Lelinho da Motta Marques;
Maria José Brito Zakia
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| Advisor: | Maria do Carmo Calijuri |
| Abstract | |
The theories on the operation of the lotic systems developed over the recent years, the geological/geomorphological condicionantes as well as the transition areas have been receiving growing importance. The transition areas deserve prominence once the lotic systems establish flow interactions with the neighboring environment (atmospheric, terrestrial and undergrounds) and the exchange of materials established among those systems is important in order to define their characteristics. The watersheds of the Moquém and Água Clara streams, studied in the present work, present: geographical proximity besides morphologic and climatic similarities, however they differ as far the geological and geomorphological aspects are concerned. From those aspects, the present research investigated the seasonal flutuations in physical, chemical and hydrological relationships among superficial and groundwaters (adjacencies of the channel), in the area of the low course of already mentioned the streams. It was chosen two reaches in each stream in order to accompish: (1) monthly hydrological inventory, starting from measures of drainage speed, discharge and water level in wells installed in floodplain of the streams in the studied reaches; (2) physical and chemical characterization of testimonies in floodplain of the rivers, where samples were used obtained during the perforation of the wells; (3) samplings of the superficial and groundwaters in the same period of the inventory in order to determinate the physical and chemical characteristics of same them. The results notice the following items. The base flow guaranteed regular and high discharges in the Água Clara stream, at the same time that the discharges were almost insignificant in the ribeirão of Moquém, a fact that presents ecological importance. The chemistry of the waters of the studied streams is different, possibly, as an answer to the natural characteristics of the watersheds. In the two studied reaches, the superficial and groundwaters presented physical and chemical differences, what can indicate that the changes between the channel of the river and it adjacencies are small and/or slow. Based on this research observations, it is recommended that the quantitative and qualitative, characteristics, between the waters of the Moquém and Água Clara streams should be appraised during the moment the decisions are made on management processes of hydric resources. (AU) | |