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This study presents a land-use design model for transit-oriented development planning at the regional level. The proposed model allocates a city's residential, employment and recreational activities according to four objectives and six groups of constraints. In order to handle adequately the presence of uncertainty and the flexibility needed in practical planning, the inputs and outputs of the model can be grey numbers. To solve the proposed model and other grey multi-objective programming models, the Grey TOPSIS approach can be adopted. The model is applied to Taipei City. Recommendations are made regarding the case study and a sensitivity analysis informs policy formulation and parameters setting. Este estudio presenta un modelo de diseño de uso del suelo para la planificación de desarrollo regional orientado al tránsito de ámbito regional. El modelo propuesto asigna las actividades residenciales, laborales y de recreo de acuerdo con cuatro objetivos y seis grupos de restricciones. Para poder manejar adecuadamente la presencia de incertidumbre y la flexibilidad necesaria en la planificación práctica, los inputs y outputs del modelo pueden ser números grey. Para resolver el modelo propuesto y otros modelos de programación multiobjetivo grey, se puede adoptar el método Grey TOPSIS. El modelo se aplica para Taipei City. Se ofrecen recomendaciones sobre el estudio de caso y un análisis de sensitividad asesora en la formulación de políticas y el establecimiento de parámetros. [ABSTRACT FROM AUTHOR]

This paper presents results of a case study on cliff recession mechanism and progressive development of talus deposits around Xiangshan of the Sishou Hills in the southeast of the Taipei Basin. Based on photogrammetric analysis and physical modeling, the geomorphologic changes of talus deposits are carefully examined and the cliff recession rates from 1904 to 2005 are thus measured and tabulated. Our study identified the fundamental control factors on mechanisms of cliff recession and proposed a possible scenario of cliff recession and progressive development of talus deposits around the Xiangshan region from 1904 to 2005. [ABSTRACT FROM AUTHOR]