最新刊期
卷 ， 期 1 ， 1992
- 摘要：The study area is situated in the Loess Plateau of the north Shaanxi province, with severely dissected landform, diffcult transportations, irrational land-use, serious soil erosion and frail ecological environment. In order to change this situation, it is necessary to survey the land types and their distribution, which is the basis to evaluate and utilize the land resources rationally.In this paper, the methods and procedure of surveying land types and mapping （1: 100000） using TM imagery are discussed. The distributing regularity of the land type and the factors of forming the regional differentiation of the land types in this area are analyzed. Finally, the regionalization of land types and the measures to manage the regions are put forward.
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发布时间：2021-06-10 - 摘要：In the topographically-broken gullied and hilly region of the loess plateau, we analyse the relationship among the density of gully, the developmental stage of gully, geomorphic form and soil erosion intensity with aerial photograph, and get some better results. Density of gully in this area is so high that it can reach 20km/km2; the erosive intensity varies with the different gully developmental stage; at the most active and densely gullied area, it has the most erosive intensity. According to the relationship between soil erosion total and erosion inensity, we set up a soil erosive model, divide multiple types of soil erosios using remote sensing image, measure erosive area and deposit total, and calculate the erosion intensity of varied erosive types with multivariate regression analysis methods, Finally we discuss some new teachnical ways to forecast regional erosive total.
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发布时间：2021-06-10 - 摘要：Water resource planers and managers must understand the water bady distribution such as ponls, pools, lakes and reservoirs within the research area for making more effective use of water resources. Remote sensing technigues of satellite has provided us new data contahing above information. But, due to limitation of pixel resolution characteristics of Landsat, those smaller water bodies distributed widely over our country can’t be effectively extracted.In view of the situation, this paper concretely analyses and discusses principle and results of two water body interpretation methods by single near-infrared and Landsat chromaticity coordinates techniques, based on Landsat CCT data.At last, a "proportion Estimation" method is introduced. It not only distinguishes smaller water bodies, but improves area accuracy of interpretation compared with the results at the same experimental watershed.
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发布时间：2021-06-10 - 摘要：Snow cover is an important resource of the earth. It is very useful for climate research, agriculture and water resources management to investigate and monitor the distribution of snow cover in a large area and river basins using remote sensing technology.In this paper, we discussed the feasibility and complexity of snow cover dynamic monitoring using meteorological satellite data, and described the theory, method and the data processing procedure of snow cover monitoring using the Advanced Very High Resolution Radiometer （AVHRR） data.We used two methods for snow cover monitoring, one is weekly （or ten days） data compositing and threshold testing for large area snow cover detection in order to reduce the effects of cloud and other atmospheric contamination, the other is an algorithm to used cloud-free data over local area of river basins. According to these, we have done a lot of the testing research work over China and several local areas such as Anyemaqen Shan area in the upper reaches of the yellow river. We found that AVHRR/HRPT data is very useful to do snow cover monitoring and to calculate the extent of snow cover. Although it can not be used to measure the snow depth directly, it can be used to estimate the snow cover area and the percent of snow cover. And also it can be used to monitor the changes of snow cover. Finally, we summarized the analysis of the results and snow cover monitoring in the future.
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发布时间：2021-06-10 - 摘要：Since 1987 the thermal emission from sea ice in Liao Dong and Bo Hai Bays has been measured by multi-frequency microwave radiometers designed by Changchun Institute of Geography, Academia Sinica. The relationship between dualpolarized brightness temperature and some related parameters, such as sea ice thickness, salinity, temperature, etc., has been experimentally obtained. To quantitatively understand the functional dependence of brightness temperature on those parameters and frequency, polarization, etc., we have developed a numerical modeling of radiative transfer for a layer of sea ice, which is modeled as alayer of strongly-fluctuating, anisotropic, random medium. The average dielectric permittivitp of the random medium is calculated by the empirical analytic formulations. Then, the radiative transfer equation for this model is numerically solved by using the discrete-ordinate and eigenana-lysis method. Numerical results are favorably compared with the experimental measurements. The functional relationship between the brightness temperature and various parameters are quantitatively discussed.
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发布时间：2021-06-10 - 摘要：It is the basic work of the hydropower project to study the engineering geological environment of river valley, which effects the locating of project and the power of station.In this paper using aerial photos we interpret the physical geology phenomenon （including landslide, collapse and rockstack） along the valley of the Ya Longjiang River, from the Xian Shuihe River to Guandi, ranginy 510 km, in the southwest China. Utilizing the methods of mathematical statistics and engineering geology we also evaluate the engineering geological environment of this section of the river valley, predict the tendency of the development and provide decision basis for exploiting the rich water resource of this area. The way of our work in this paper has general sense for studying engineering geological environment of a region, especially in a river valley, in which the basic work is weak natural condition is adverse and the ground work is difficult.
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发布时间：2021-06-10 - 摘要：In the 1980’s a new type of remote sensing technology, so called imaging spectrometry,. had developed. In this paper, the concept of imaging spectrometry, its theoretical basis and analytical methods of extraction for spectral information have been discussed. Based upon extraction of spectral information for the gold-bearing alteration zone by Fine-split Infrared Multi-spectral Scanner （FIMS）, and data-processing of the 19-Band AMSS, Geoscan MKII AMSS and GER 64-Bahd imaging spectrometer, some methods of data-processing and analysing of Imaging Spectrometers Information had been tested and developed.The procedures are approximately included as follows: （1） Transformation of raw image to reflectance one; （2） Displaying of imaging spectral curves of imaging spectrometer; （3） The parameter-measuring of spectral absorption band; （4） The algorithm-matching spectra for a library of lab. spectra with spectra-extracted from the imaging spectrometers data each other, ect.
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发布时间：2021-06-10 - 摘要：In this paper various types of ring-like images have been studied systematically, which appear on remote sensing imagery, locate on outer and inner the oil-gas field of the loess plateau on the east part of Gansu province, Among them six different types of tonal ring-like images. on the south region of the study area were chosen and the related soil geochemical data from outer and inner the six tonal ring-like images have been analyzed. The results show that: （1） All of the tonal ring-like images on the imageries come from geochemical haloes. （2） The Y-1 ring covering a known oil-gas well is a oil-gas halo ring with a significant relationship between geochemical data and ground soil spectral response. By analyzing the tape lightness of the ring images, the regular variations of the lightness mean values between inner and outer the oil-gas halo rings have been discovered. One of them is the significant difference proved by the variance analysis. In order to identify the general applying significance of the Y-1 ring lightness varying regulations, another tonal ring covering a productive oil-gas well, a tonal ring-covering no oil-gas well, a tonal ring covering a nonsignificant productive oil-gas well and a known oil-gas region, which are located on north part of the study area that shows a slightly different in geographic conditions from the Y-l ring area, have been compared between each other for their lightness variation regulations. The researches are resulted in the following model for estimating oil-gas haloes from the remote sensing imagery:（1） On the colour composite imageries from the TM4（R）, TM5（G） and TM7（B）, the tonal ring-like image red tone on the inner ring and blue tone on the outer ring are suggested to be oil-gas halo ring.（2） The CCT tape lightness mean values of the outer rings are almost higher than that of the inner rings in the TM1-7 and TM5/7.（3） Except the TM4, the lightness mean values of all the TM bands give significant differences between inner and outer rings.
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发布时间：2021-06-10 - 摘要：It has been for years in applying hydrocarbon’s micro-seepage to prospecting for oil and gas. There are a lot of indirect evidence which are pertinent to hydrocarbon’s microrseepage including anomalies of geomorphology, geochemistry and mineral, and recently known abno-mals of soil chemistry, and vegetation physiology. As a matter of fact, these alteration haloes can be divided into following classes: redbeds bleaching haloes, clay enrichment haloes, car-bonatite enrichment haloes, radiation haloes, heat anomaly haloes, geobotanical anomaly haloes, magnetic anomaly haloes, and haze haloes.All of these haloes might exist in overlain beds of reservior in different scales and types. These phenomena can be used as direct and/or indirect indexes to detect oil and gas information with remote sensing means.According to spectral survey on these alteration haloes, it is shown that every one has its own spectral features obviously in the visible, near-IR, and thermal-IR wavebands. So it is available to look for oil and igas with remote sensing means directly. Finaly, our aim is to select the best wavebands for oil and gas.
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发布时间：2021-06-10 - 摘要：In this paper the relationship between space distribution of data of remote sensing and space distribution of agriculture exploitation elements is discussed from problem of agricultural development in Shanxi province.The establishment of space distribution of vertical climate feature data base is presented by the author for analysis and definition suit able area for winter wheat and other plants. This data base is a combination of conventional data and quantization of remote sensing images.In this paper fundamental train of thoughi and method of establishing this data base is introduced. Choise of objective feature of data base, choise of basic data, edit of data documents, method of microtopography revise, edit program of run data base and so on are discussed.In order to widely apply quantitative information of satellite data, we also discusse the relationship between NOAA-AVHRR data and climate feature and introduce the experiment of drawing colour maps of data of space distribution of climate feature, by using NOAA satellite thermal channel data.
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发布时间：2021-06-10
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