Qualitative analysis of exogenous geological processes in the Ciudad del Conocimiento, Imbabura
The present work is focused on the evaluation of soil erosion by water in the Ciudad del Conocimiento Yachay on an area of 4462 hectares by using the Universal Soil Loss Equation (USLE). In the past, this zone was dedicated to agriculture and now it is deteriorating rapidly associated with the chang...
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| Format: | bachelorThesis |
| Idioma: | eng |
| Publicat: |
2021
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| Matèries: | |
| Accés en línia: | http://repositorio.yachaytech.edu.ec/handle/123456789/353 |
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Afegir etiqueta | Sumari: | The present work is focused on the evaluation of soil erosion by water in the Ciudad del Conocimiento Yachay on an area of 4462 hectares by using the Universal Soil Loss Equation (USLE). In the past, this zone was dedicated to agriculture and now it is deteriorating rapidly associated with the change in land use. Another aspect that favors the acceleration in the erosion is the geological composition of soil, the degree slope, the amount of rain and the vegetation coverage, all these values are computed by the USLE. The rainfall and runoff erosivity factor (R) that is calculated from rainfall data shows a range between 1624,5 and 3159,3 ((MJ ∙mm)/(ha ∙hour∙year)) with a relation between altitude and amount of precipitation. The soil erodibility factor (K) calculated from the physical characteristics of the soil shows a range data from 0,0026 to 0,0692 (Mg/ha) ∙ ((MJ ∙ mm)/(ha ∙ hour))^(-1) for the city with no major pattern depending on the order of soil. The slope gradient factor (S) and the slope length factor (L) calculated as one factor, depict values that ranges from 0 to 118,81 showing the relation between the slope and erosion. The higher the degree slope, the higher the value calculated. The cover management factor (C) calculated from satellite imagery ranges from 0,054 to 0,952 and shows the inverse relation between the vegetation coverage and the risk of erosion from water. Computing the data obtained from each factor we calculate the erosional rates in the Ciudad del Conocimiento that ranges from 0 – 3853,35 (Mg/(ha∙year)). The classification used describes a very high rate of erosion mainly at high slopes degrees as located in ravines and hills. Agricultural areas show a very high level of erosion, although they are in areas with low slopes, due the characteristics of the soil. |
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