Cambios de uso de suelo mediante tecnicas de sistemas de informacion geografica en una region cacaotera | Change of land use by means of geographical information systems in a cacao region
2004
Ramos-Reyes, R. | Palma-Lopez, D.J. | Ortiz-Solorio, C.A. | Ortiz-Garcia, C.F. | Diaz-Padilla, G.
In this work the changes of soil use were analyzed in the north-central part of the Chontalpa region, Tabasco, Mexico in 1972, 1984, and 2000. Also, the cartographic information on units of land and their potential for growing cacao were up-dated, which was the direct result of classification by use capacity. The methodology used for the analysis was based on photo-interpretation and the historical comparison of aerial photographs taken in 1972 on a scale of 1:60 000 and in 1984 and 1995 on a scale of 1:75 000 were carried out. From 1995 to 2000, the use was up-dated by means of field verification. Later, a geographical information system (GIS) was used to construct maps by digitization. The results showed that the soils most suitable for growing cacao were the Eutric fluvisols. It was also found that agricultural use decreased by 7.5% between 1972 and 2000 in an area of 1 235 ha but held second place in land use by area (38.23%). Livestock production increased by 4.56% between 1972 and 2000 and was the most extensive activity in the zone. The speed in the change of land use during the first 12 years analyzed decreased slightly, but during the last 16 years it increased. There were severe losses in area of natural vegetation, decreasing from 1.98% in 1972 to 0.28% in 2000 in an area of 1 235 ha. Other uses, such as urban areas and oil drilling, underwent slight to moderate increases in area. Grassland increased (4.56%), and vegetation types in general suffered very severe degradation (1.7%).
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