The objective of this study is to reproduce turbid ocean color on the coral reef of Amami-Oshima Island which located in Kagoshima Prefecture, Japan using the bio-optical model in consideration of bottom reflectance. The comparison between the model and in-situ reflectance at the surface water under four kinds of conditions is tested. As a result, the absolute values is different, but the significant correlation (R²>0.80) was acquired. Moreover, ocean color at the time of changing water depth and SS on coral reef was reproduced using CIE color coordinate theory (xyY color coordinate). It was confirmed that the significant correlation between water depth and SS have hue (x, y) and brightness (Y) of ocean color, respectively. This bio-optical model serves as a good tool reproducing ocean color under turbid condition on coral reef.

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要旨：本研究は，奄美大島を対象地とし，島の滞在による来訪者への心理的効果を実験的に検証することを目的とした。実際に体験ツアーを実施し，離島での様々な体験活動をとおして，気分及び健康関連ＱＯＬにどのような変化がみられるかを明らかにした。指標として，気分プロフィール検査及びＳＦ健康調査票を用い，20代前半の学生を対象に，日常生活，ツアー直前，ツアー直後の3回の測定値を比較考察した。さらに，ヒアリング調査を行い考察の際の参考とした。結果として，奄美大島での滞在により，被験者は身体的な疲れを感じつつも，精神的な健康を取り戻すことができたことが推測された。特に，日常生活においてストレスを感じている人の方がその変化が顕著に現れた。これには，豊かな自然環境のもとで，普段できない経験や人との交流などが刺激となっていると考えられた。結果として，奄美大島における短期滞在により，気分転換や心理的健康感の向上などの効果があることが実証された。

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In this analysis, we used zone travel cost method (ZTCM) to estimate the recreation value of the nature and cultural resources of Amami Oshima and analyzed its implication for tourism policy. This is the first time to measure the tourism resources of the island. The analysis was performed by using the questionnaire data collected at the Amami airport in 2002, based on the results of a preliminary survey. After briefing the characteristics and trend of the tourists in Amami Oshima, we reviewed the theoretical background of the ZTCM and examined the basic validity of its application to the collected data. Then, we found that the recreation value of the island is to be nearly 10 billion yen per year. Finally, this article suggests that the total economic effects including the private benefits counted on the basis of regional accounts might be about 40 billion yen per year without the external negative effects of tourism.

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The Visitor Center (VC) is a facility that provides information to natural park users. The purpose of this study is to classify the location environment and obtain basic knowledge for VC awareness improvement and functional improvement. The target is 200 VC facilities in national parks. Data collection and generation were carried out, and finally spatial coupling using GIS was carried out. In classification,1) Inside or outside the park;2) Less than 500m or more in the park world; 3) What is the land type, Classified from three viewpoints. The results show that it was classified it into six types. I. Entrance location type in the park:27%; II. Core location type 11%; III. Use base location type 37%; and IV. Edge location type 9% V. Out-of-park entrance type 8%; VI. Non-adjacent 9%. From this result, it was revealed that the VC facility was located in line with the park plan. The entrance type occupies 34% and is near the entrance of the park. The base type is 37% and the second special area locations in the whole are 54%. In this study, the classification of national park VC was arranged, and the present state of the location characteristics was clarified.

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