The remote sensing composite information of Nansha reef''s closed atoll and the model of its spatial structure evolution——Ⅰ

Based on the feature of the growth and the local limitation of the Nansha reef's closed atoll, also the relatedremote sensing information of it, the composite analysis is made. The closed atoll conception remote sensing system is constructed through the formation mechanism, development law and the space-time distribution of the closed atoll. Solution of the equation consisting of information function value and isostatic value of closed atoll and half-closed atoll using this system, and topologic analysis on the two kinds of atoll's morphologic growth are the basic foundation for the research of their evolutionary comparative model.     

Remote sensing composite information of Nansha reef`s closed atoll and model of its spatial structur

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The research on the remote sensing''s information tree model of the Nansha coral islets and reef''s spatial structure

Ｔｈｅｒｅｓｅａｒｃｈｏｎｔｈｅｒｅｍｏｔｅｓｅｎｓｉｎｇ＇ｓｉｎｆｏｒｍａｔｉｏｎｔｒｅｅｍｏｄｅｌｏｆｔｈｅＮａｎｓｈａｃｏｒａｌｉｓｌｅｔｓａｎｄｒｅｅｆ＇ｓｓｐａｔｉａｌｓｔｒｕｃｔｕｒｅ￥ＬｉｕＢａｏｙｉｎ；ＷａｎｇＹａｎｆｅｎｇａｎｄＨａ...     

A remote sensing environmental study of Haiko Bay——Ⅰ Tidal influx and its changes

Through the water areas extracted from remote sensing images and the combination of the methods for establishing the formula for calculating tidal influx with tidal data, the tidal influx of the Haikou Bay, Hainan Province was found to be 5.14×10⁷m³ in 1990, 5.80×10⁷m³ in 1984 and 5.05×10⁷m³ in 1965, respectively.After the analysis of the morphological and tidal range factors which determine tidal influx, this paper presents the trend of the changes in tidal influx caused by the changes in the morphological factors of the Haikou Bay.It is found that a decreasing trend was shown with a depressive rate of 2×10^-3during the period from 1965 to 1984, and an increasing trend with an incremental rate of 1×10^-3 during the period of 1984-1990.The main reason for the appearance of the decreasing trend before 1984 is the natural deposition and silting-up of the bay sediments; after 1984, the dredging and expansion of the Haikou Port and the Haikou New Port which caused an increase in water area at the mean low tide are the leading factor which causes the increase in tidal influx.     

Extracting spatial patterns of ocean fishery using GIS and RS——Taking the East China Sea as an example

The ocean fishery and the corresponding environment are highly interrelated according tothe production experiences of ocean fishing population. The spatial cluster patterns are constructed using the remote sensed data and long-time series fishery production data under the uniform coordinate based on GIS techniques. Thus, the hidden information of distribution regularities between ocean-hydrologic factors and central fishing ground can be extracted from these patterns. It is important to forecast the ocean fishery production.