Dissertação
Metodologia para determinação da retenção de água pelo campo nativo do bioma Pampa
Fecha
2022-10-27Autor
Jaeger, Cabrieli Aline
Institución
Resumen
The lack of information about the existing relationship between the native field’s
herbaceous vegetation and hydrological processes runs through the years, and makes
it impossible to measure the impact that this change of the soil natural covering can
cause in a river basin. Thus, this present paper had as general objective to evaluate
the rain simulators as a method to determine the water retention by native and
serrapilheira vegetation of Pampa Biome; and as specific objectives, contribute to the
method of water retention determination by herbaceous vegetation: evaluate
applicability of the rain simulator as a method to determine water retention by native
and serrapilheira vegetation of the Pampa Biome; and estimate water intercepted by
the air and root vegetation, using local rainwater data. The methodology used was the
field research taken in Rosários do Sul town, in 2014, and in Caçapava do Sul, in 2021;
where a rain simulator, structured samples of native field and soil vegetation, to the
application of rain tests at 100 mm.h
-1
, in order to determine the quantity of water that
gets retained in herbaceous plants. From this, an estimation of water retention by
vegetation during rainy events was made, from historical rainfall data. Numbers found
were 13,2% retention to Rosário do Sul’s vegetation and 4,5% to Caçapava do Sul’s
vegetation; showing an overall average of 8,9% of total rainfall incidence to this biome.
The method used in this present paper showed itself as a favorable alternative for
obtaining data on water retention by native field herbaceous vegetation, because,
besides its limitations, numbers observed were similar to the ones found in literature.
However, due to the uncertainties the method presents, especially to sensitivity to
efficiently register a small portion of retained water; to the difficulty in obtaining samples
with equal thickness, and to the association between root and air parts of the plant, it
is necessary to hold methodological adjustments in order to increase the accuracy of data.