ENSAYOS DE IMPACTO SOBRE LA JATATA (Geonoma deversa) BAJO DIVERSOS TRATAMIENTOS FÍSICOS
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Revista Boliviana de Física
Abstract
La jatata (Geonoma deversa) es una palmera tropical con un larga historia de aprovechamiento tradicional para la elaboración de paños utilizados para techados de adorno, que son elaborados principalmente por el grupo étnico T'simane. Estos paños han sido introducidos y comercializados en el área urbana de las tres capitales principales de Bolivia, sufriendo un deterioro en la estructura misma de la hoja, principalmente en la ciudad de La Paz, lo que provoca una dramática disminución en su tiempo de vida, siendo las causas posibles de este daño las condiciones climáticas a las que fueron expuestas. En este trabajo se realizó un estudio de la fragilidad de las hojas de jatata bajo cambios térmicos, hídricos, y exposiciones a radiación UV. Se encontró que los ciclos diarios de humedad de La Paz (saturación a seco) causan los mayores daños a las hojas de jatata.
The Jatata (Geonoma deversa) is a tropical palm tree whose leaves have been traditionally used in roofing, particularly by the T'simane ethnic group in the lowlands of Bolivia. Jatata roofing panels have been introduced and marketed in Bolivia's three main cities - Santa Cruz, Cochabamba and La Paz. In La Paz a greater deterioration of the leaf structure is observed causing a dramatic decrease in roof lifetime. It is thought that climatic conditions are responsible for the degeneration of the roof panels. A study of the fragility of the jatata panels was carried exposing them to changes in temperature and humidity, and also to differing levels of ultraviolet radiation. We find that the most significant influencing factor are the daily moisture cycles at La Paz (from saturation to dryness) causing the most damage to the jatata leaves.
The Jatata (Geonoma deversa) is a tropical palm tree whose leaves have been traditionally used in roofing, particularly by the T'simane ethnic group in the lowlands of Bolivia. Jatata roofing panels have been introduced and marketed in Bolivia's three main cities - Santa Cruz, Cochabamba and La Paz. In La Paz a greater deterioration of the leaf structure is observed causing a dramatic decrease in roof lifetime. It is thought that climatic conditions are responsible for the degeneration of the roof panels. A study of the fragility of the jatata panels was carried exposing them to changes in temperature and humidity, and also to differing levels of ultraviolet radiation. We find that the most significant influencing factor are the daily moisture cycles at La Paz (from saturation to dryness) causing the most damage to the jatata leaves.
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Vol. 18, No. 18