Study on Hillslope Soil Hydrology with Various Bahia grass Treatment
| Autor: | Hsien-ming Chang, 張賢明 |
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| Rok vydání: | 2001 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 89 Study on Hillslope Soil Hydrology with Various Bahia Grass Treatment Abstract Soil moisture lysimeter is an equipment with fixed volume usually utilized to study hillslope hydrology and soil erosion. Three lysimeter were located separatedly at the plots of covered, mulched and bare hillslope for 20 years in order to study the influence of different treatment on the physical property and hydrogy of soil. General infiltration was measured by static cylinder infiltratiometer. Rainfall infiltration changed with rainfall intensity, slope degree and rough degree was in a dynamic state. Covered and mulched treatments could keep much more rainwater and increased infiltration of soil. After long-term treatments, accumulating infiltration decreased in all three cylinder infiltratiometer. Simulating tests with Kostiakov, Horton, Philip and Swartzendruber infiltration model were also studied. Swartzendruber model was the best one for calculating static infiltration in this experiment. There were much more porosity in the slope covered with long-root Bahia grasses. Much more rainwater was absorbed by the soil than permeated down to the underground to complement the underground water resource. Series of regression equations about annual rainfall to run-off, infiltration and evapotranspiration were established by useing of the data of hydrology studies from 1976 to 1995. It was shown that this study model was useful for the prediction of annual hydrology and the management of water resource on the hillslope. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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