広島平野で採取された沖積層のボーリング・コアを分析し,FeS₂-S含有量の垂直的変化を検討することにより・海成層一陸成層境界の認定を試み・これをもとに沖積層の堆積構造について考察を行なった.
広島平野の沖積層は層相と堆積環境とにより,下位から下部陸成砂層,下部海成砂層,上部海成粘土層,上部海成砂層,上部陸成砂層,最上部陸成シルト層の6層に細分される.さらに,海成層一陸成層境界にもとついて完新世の汀線変化を推定した・その結果・完新世初期の急速な海水準の上昇により,海岸線は後退したが,アカホヤ火山灰が降下した 6,300年前以前の海水準が-6m前後に達した時期から,海水準上昇速度の減少により・海岸線は前進に転じた.また, 6,300年前以降の海水準が-3.5m前後に到達した時期から・海水準上昇の加速化・または河川の土砂供給量の減少により,海岸線がわずかに後退したと考えられる.

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従来,時間地理学の研究は,一部の領域を除いて概念的枠組の検討の段階にとどまっており,特にわが国においては観察された行動を表記する技法として利用されるにすぎなかった.これに対し,本研究は,時間地理学の人間行動の解釈への応用の可能性とそれに当たっての問題点を,事例研究にそって具体的に明らかにすることを試みたものである.
事例として漁師の漁場をめぐる行動をとりあげ,時間地理学の見方からの解釈を示すことを試みた.その結果,一見無秩序に見える行動であっても,時間地理学の見方を適用し,主体(漁師)の行動をその相手(魚)との結合couplingを目標としてなされるものと規定し,当該行動にとって意味のある時間(自然の時間)ということに注目した場合,ある程度まで合理的な解釈が可能となることが示された.

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Japanese agriculture in the Edo period substantially depended on the fish fertilizer. In every agrarian village in those days land was continuously cultivated without fallow and fertilizer application was necessary to maintain the soil fertility. As the grass fertilizer from woodlands was limited, a demand for fish fertilizer expanded.
Sardine fisheries developed along the south and east coast of the Kanto District, where existed many wholesalers specialized in sardine fertilizers. Particularly such wholesalers in Edo and Uraga played a very important role in the distribution of the fish fertilizer.
Uraga, located on a small bay of Miura Peninsula just across from Boso Peninsula, was an important port of transit, where wholesalers played a crucial role transferring dried sardines for Kamigata (Kyoto and its vicinities). Their activities, however, were subject to the influence of the larger wholesalers in Edo.
The anther analized the transformation of trade areas of fish fertilizer wholesalers in Uraga during the latter half of the Edo period. The results obtained are summarized as follows.
1. In the early Edo period Uraga wholesaler's collection area of sardines spread widely along the Pacific coast from the northernmost province of Mutsu to Izu Peninsula. In the mid-Edo period, however, it became restricted to some villages in Boso Peninsula. In the late Edo period a small fishing village of Katsuura in Kazusa Province of the Peninsula was the only place to supply Uraga wholesalers with sardines.
2. Competition with wholesalers in Edo was the main cause of the decline. When the new fishing gears (beach seine) appeared in Boso Peninsula, wholesalers in Edo were easily able to supply fishermen with fund reguired to materialize such advancement, thus expanding their control over the fishery. Uraga wholesalers being unable to compete with the Edo wholesalers in extending fund, their sphere of collection became restricted to minor fishing areas where primitive fishing gears such as pair boat lift net were still used. Furthermore, some feudal lords began to buy fish fertilizers for their peasants directly from producers.
3. While Uraga wholesaler's major market was Kamigata in the early Edo period, it shifted in the later period to the nearer districts such as Sagami and Owari Provinces (the present-day Kanagawa and Aichi Prefectures, respectvely). The central part of Sagami, where the fish fertilizer began to be used in the 1730s, became the market of Uraga because of its accessibility. As for the Province of Owari, the feudal lord preferred to use his ships carrying fish fertilizers on their return trips.

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This paper attempts to build a multi-regional econometric model for the purpose of establishing a frame work of urban land use and also to examine its effectiveness as a method for the analysis of urban land use.
In recent years the governmental organization, where it takes a planning decision as in the case of city planning decisions, has come to be strongly urged to formulate a plan through scientific methods on a clear and definite foundation. As far as land use planning is concerned, it is required that a mathematical model which depicts a number of changing regional phenomena relating to land use be built and that the prospective land use pattern of the region concerned be forecasted by the model quantitatively as well as logically. Although some mathematical models on land use have been developed, none of them is deemed acceptable as a standard technique for practical use.
The type of the model discussed in this paper is a regional econometric one, because an empirical model is needed for practical use. The Ward Area of Tokyo is divided into seven zones and the model has been built to be applied to each one of them. The variables that have been selected to index land uses are floor area ratio, ratio of non-wooden buildings, floor area of office buildings, and ratio of roads. With these variables taken from the data over the period of 1965 to 1978, the land use model has been built to simulate the processes of land use change in the Ward Area of Tokyo.
As a result, it has become clear that the floor area ratio can be explained by the acoumulation of buildings kind the development of the transportation facilities. The fitness of the model is so good that the future land use of the area may be predicted with necessary accuracy. In addition, it has been shown that despite the limitations in its range and objects the model could be used as an effective tool to analyse urban land use if variables were examined carefully.

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