A Study on Amount and Spatial Extent of Recreational Demands in Suburban Area. An Application of Gravity-type Model.:-An Application of Gravity-type Model-

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Recently, demands for recreational use of suburban areas have been increasing rapidly. These increasing demands require new public investments and management systems, according to the amount of demands, the spatial extent of demands. It is necessary to develop indices to evaluate these characteristics of demands. This paper aims firstly to estimate Gravity-type residents' trip model, and secondary to evaluate recreational value of suburban areas based on the model.<BR>According to this model, extension of the accessible area, and the amount of visitors are estimated. The first is defined as the distance from a recreational to a resident area where the trip probability equals to 1%, and the second is defined as integral calculus of the product of trip probability and population.<BR>This model is applied to seven recreational areas in Kanagawa prefecture. The data were obtained from questionnaire survey in 160 points. Answers available were 4683 sheets. Regression analysis showed that the estimation based on Gravity model well fitted with the data. After estimating the parameters of the model, the indices were calculated for each forest. These results show the accessibility is an important factor of recreational demands.
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