This paper selected 6S (second simulation of the satellite signal in the solar spectrum) model with dark pixel method to inversion aerosol optical depth by MODIS data, and got the spatial distribution and the temporal distribution of Chongqing urban area. By comparing with the sun photometer and API data, the result showed that the inversion method can be used in aerosol optical thickness monitoring in Chongqing urban area.
It is a simple and efficient way to complete the custom program according to the GIS spatial analysis function supported by ArcGIS Geoprocessing. In this paper, the ArcGIS Geoprocessing technology based on the plug-in GIS Secondary development is used to build the drought remote sensing monitoring system. The 2006 drought data in Chongqing was processed as an example for this system, and drought monitoring models suitable for Chongqing were selected. Compared to the traditional manual processing, the system’s automation degree has been greatly improved and enhanced, which can accurate decision-making basis for the relevant departments.
There are regional and periodic droughts in Chongqing, which impacted seriously on agricultural production and
people's lives. This study attempted to monitor the drought in Chongqing with complex terrain using MODIS data. First,
we analyzed and compared three remote sensing methods for drought monitoring (time series of vegetation index,
temperature vegetation dryness index (TVDI), and vegetation supply water index (VSWI)) for the severe drought in 2006.
Then we developed a remote sensing based drought monitoring model for Chongqing by combining soil moisture data
and meteorological data. The results showed that the three remote sensing based drought monitoring models performed
well in detecting the occurrence of drought in Chongqing on a certain extent. However, Time Series of Vegetation Index
has stronger sensitivity in time pattern but weaker in spatial pattern; although TVDI and VSWI can reflect inverse the
whole process of severe drought in 2006 summer from drought occurred - increased - relieved - increased again -
complete remission in spatial domain, but TVDI requires the situation of extreme drought and extreme moist both exist in
study area which it is more difficult in Chongqing; VSWI is simple and practicable, which the correlation coefficient
between VSWI and soil moisture data reaches significant levels. In summary, VSWI is the best model for summer drought
monitoring in Chongqing.
According to the MODIS data from June 10 to September 21 in 2006, 12 phases of drought spatial distribution in
Chongqing have been gotten based on vegetation supply water index (VSWI), which showed the whole evolution
process of severe drought in 2006 in Chongqing from drought occurred - increased - relieved - increased again -
complete remission. To verify the monitor accuracy of VSWI in Chongqing severe drought in 2006, the soil moisture
data in 170 soil moisture monitoring stations in the same period was used. The results are shown as three aspects: 1.
Vegetation supply water index (VSWI) based on MOIDS data can monitor in real-time and feedback effectively summer
drought in Chongqing. 2. VSWI and soil moisture have a good negative correlation. 3. The correlation index between
VSWI and soil moisture also have certain relationships with elevation.
In this paper, we developed method to find the suspicious breeding region of oncomelania in Three Gorges reservoir area
based on GIS. Major data used in this study include meteorological data of 56 stations during 1971-2000, hydrological
data of the main channel and tributaries of Changjiang River, and ETM remote sensing data. With the evaluation of
refined meteorological element distribution maps,
water-level-fluctuation zone, vegetation, and other factors, we found
the suspicious breeding region of oncomelania in Three Gorges reservoir area, and selected two focus regions of qukou
in Kaixian and dachang in Wushan for further monitoring.
This article calculated the distribution of the index temperature-humidity and wind effect in Chongqing based on the
spatial distribution of temperature, sunshine duration, wind speed, and relative humidity, which considering the influence
of terrain. With the guide line of W. H. Terjung Method, we categorized the distribution of comfortable climate for
tourism in Chongqing. The results showed that the distribution of comfortable climate for tourism in Chongqing
basically consistent with the actual situation, and has the typical of regional and seasonal characters, Comparing to
spatial interpolation methods of the past which do not consider the role of terrain effects. It is a useful experiment in the
study of the comfortable climate for tourism over the rugged areas.
The development of WebGIS and its widely application provide a good technical support for the network map
publishing. This article mainly researched the command of ArcIMS's ADMINCMD, and executed command
management to the ArcIMS server with ArcXML technology. In this technical foundation, an automation publishing
system based on ArcIMS server has been designed. It gives an example of application combined the Chongqing climate
resources management information system.