CARACTERÍSTICAS DO DEFLÚVIO DE DUAS MICROBACIAS HIDROGRÁFICAS NO LABORA TÓRIO DE HIDROLOGIA FLORESTAL WALTER EMMERICH, CUNHA - SP
DOI:
https://doi.org/10.24278/2178-5031.199792608Keywords:
small watersheds, daily streamflow, direct runofAbstract
The flow duration curves of daily streamflow and the relationships between precipitation and stormflow of the B and D experimental small watersheds in the Walter Emmerich Hydrologic Laboratory were studied for six years. The mean daily flow of the watersheds during the dry and wet periods were respectively; B watershed: 3.4 mm and 4.7 mm, D watershed: 3.8 mm and 4.8 mm. The baseflow was the main component of the daily streamflow, occurring during almost 90% of the time on the flow duration curves of the catchments. The daily direct runoff contribution was 10% of the total time of the streamflow. The stormflow volume of the B watershed was generally greater than the D watershed. There was a remarkable difference between the two watersheds hydrologic responses in different seasons of the·year. ln the rainy period, the proportion of the stormflow was greater than in the drier period. The mean hydrologic response; estimated by the direct runoff volume divided by storm rainfall were; B watershed: 0.23 and D watershed: 0.12. The larger hydrologic response in the B watershed than D watershed was mainly due to vast area of shallow soil in sloping ground which are concentrated from the top to the bottom in B watershed hillslopes.
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