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CHAPTER 7 APPLICATION OF REMOTE SENSING
IN THE MANAGEMENT OF HYDROLOGY
AND WATER RESOURCES

 

LI Jiren and HUANG Shifeng

Institute of Water Resources and Hydropower Research, Beijing 100044,China

Since 1998, remote sensing (RS) has been used in the management of hydrology and water resources, which shows the superiority of RS in impersonality, grandiosity, dynamic and economy as one of the important space information collecting technologies. These years, there has a popular application of GIS in the management of hydrology and water resources at a high level, with characteristics as combination of RS, GIS and GPS (so-called “3S” technology).  These new and higher technologies have been maturely used in the respects of flood and waterlogging disaster monitoring and evaluating, water resources and water environment investigating, soil corrosion and soil protection, river and reservoir sedimentation monitoring, river/lake and river mouth evolvement investigating as well as soil moisture and drought condition monitoring.

7.1  FLOOD AND WATERLOGGING DISASTER MONITORING AND EVALUATING

Since 1998, there are main developments in following aspects:

7.1.1  Establishing the RS Operational Running System for Flood and Waterlogging Monitoring and Evaluating

The RS Operational Running System for Flood and Waterlogging Monitoring and Evaluating, which is established in the RS Application Center under Ministry of Water Resources, started test running in 1998 and put into formal running in 2001.  The RS Operational Running System for Flood and Waterlogging Monitoring and Evaluating plaid an important role when the floods occurred in the Yangtze River Basin and North China in 1998, by which the scientific information was timely provided to the State Council and the State Headquarters of Flood Control and Drought Relief.  The system can finish remote sense monitoring and evaluation of flood and waterlogging according to the concerned technical and time requirement, operational flow and mode, which make a new progress for the application of RS in flood control and disaster reducing.

7.1.2  The Real Time Transmitting System of Airborne SAR improved. 

At present, when the plane with SAR flies over the disaster area from some kilometers away, what actually happening in the area can be real time displayed, stored and copied on hard disk in the monitoring center in Beijing, with only a few second to be lagged.

7.1.3  Flood and Waterlogging Disaster Monitoring

The solid monitoring network consists of spaceflight (Satellite-borne SAR), upper air (airborne SAR) and lower air (helicopter), with the macro and dynamic monitoring from meteorological satellite, will insure the monitoring the water structure condition and disaster development when flood and waterlogging occurring.

7.1.4  A New Progress in Disaster Evaluating

The basic background data base on GIS has been taken as the main suporting to evaluate disaster.  The important levels of the data base consist of DEM, water body, water structures, earth application, social-economy, communications and etc.  The evaluated results are flooded area, flooded inhabits and farmland area, including special topic maps, statistics reports and analyzing reports.

 

7.2  WATER RESOURCES INVESTIGATING

The shortage of water resources has become one of the main factors to restrict the sustainable development of society and economy in China.  As water resources restricting the other factors of environment, the shortage of water resources has made water environment worsening, vegetation decreasing, desertisation and species reducing.  Moreover, chemical, oil and heat pollution in water is also a severe problem that China will face at, because the influence from water environment is not less than that from the shortage of water.  Therefore, RS is playing more and more important role in water resources investigating.

7.2.1  Investigation of Surface Water Body Change

In 1980s, investigation of surface water body was mostly made with near-infrared RS images.  These years, SAR images have been used to investigate the status and dynamic change of the surface water bodies such as rivers, reservoirs and lakes.

7.2.1.1  Research on the distributed or sub-distributed hydrological models

The distributed or sub-distributed hydrological models can fully consider the uneven distribution of underlayer conditions (vegetation, soil, earth application and landform) in space, so as to correctly reflect yield change in time and space and increase the precision of hydrological forecasting and simulating, which is the basic and necessary structural form that large scale hydrological model combine with atmosphere model.  RS will provide the underlayer conditions for this kind of hydrological models, so as to determine the model parameters or directly provide input.  At present, the research on yield mechanism is the main influence on the development of research of distributed and sub-distributed hydrological model.  These hydrological models are not only the powerful stool of hydrological forecasting and simulating, but also the effective means to estimate local water resources (including underground and surface), especially they can reflect the distribution of yield in time and space and the distribution of part water resources in space.

7.2.1.2  RS monitoring of precipitation

The research has made a great progress on the quantitative rainfall forecasting and measuring with meteorological satellite and Doppler radar for rainfall measuring, which have almost meet the requirement of application now with the precision of the former reaching 70%—80% and the precision of latter reaching over 80%.  These RS means can change the traditional point rainfall monitoring to area rainfall monitoring, which will fully reflect the unevenness of rainfall distribution in time and space so that prolong the leading time of flood forecasting with the rainfall input to the networks for the distributed hydrological models.

7.2.1.3  Investigation of snow mantle, snow limit and ice stream

RS system can effectively monitor the range of snow mantle, snow state, melting condition of snow mantleuprising of mountain snow limit and ice stream melting.  These years, the new development have been made in measuring thickness of snow mantle with SAR, which makes it more precise in estimating the water equivalent of snow mantle.  The successful forecasting flood occurred in Yangtze River in 1998 partly depend on monitoring snow in Qinghai-Xizang Plateau by means of RS in the winter of 1997 and spring of 1998.  Melted snow is an important part of the water resources in the Northwest China.  At present, RS is the most effective means of investigating water resources of ice stream and melted snow.

 

7.3  WATER ENVIRONMENT MONITORING

The quality of water resources should be paid much more attention to as the same as its quantity.  With the fast development of the economy in China, it has been a very important task to harness environment pollution including water pollution.  The state government has paid important attention to the water environment problems, for example, the success has been achieved in harness of water pollution in the Huaihe River Basin, harness of water pollution in Suzhou River by Shanghai and harness of water pollution in the urban rivers in Beijing.  However, it has a long way to go in harnessing water pollution, and it is a long-term task to monitor water environment.

RS is very important in monitoring water environment.  For example, the images of navigation infrared scanning can be used to determine the temperature increase and distribution in space caused by heat pollution of water body outside of drainage outlet of the thermoelectric stations; SAR images or infrared scanner can be used to determine the range of oil pollution and oil film thickness in the sea; and TM images can be used to determine the range of aquatic organisms (alga) and equatorial tide.  In recent 10 years, a progress has been made in research on quantitative monitoring of the factors that form the quality of the water, which include turbidity, total suspended sediment, PH value and total nitrogen content.  The research has been made in Guanting Reservoir and Taihu Lake on the RS quantitative measuring the chemical factors in water body with high spectrum.  It is believed that the results will be applied in the actual production a few years later, which will provide an advanced, synchronous, fast and low-cost means to monitor water environment in large scale, so as to replace the traditional methods of water sampling and testing.

 

7.4  DROUGHT MONITORING

Drought is one of the natural disasters to make severe economic losses, which is also another factor that influences agricultural production and people life.  In the influence degree and range, it is more severe than flood and waterlogging disaster.  It is a difficult task to monitor drought condition with RS system.  As with the various views from different departments, there are various physical standards including meteorological drought, agricultural drought, hydrological drought and etc. with various drought indexes.  Although there are a few methods having developed on the base of RS data, such as the methods of thermal flux, normalization vegetation index anomaly, crop water supplying coefficient, crop shortage water coefficient and etc., which are far from the actual requirements from agricultural production.  However, the development is obvious in these years, firstly, a national data base of farmland space has been developed, which can estimate the drought condition of the farmland; Secondly, some methods have paid their attention to calculate moisture in the soil section from the moisture in the soil surface layer such as water and heat coupling equation, and microwave remote sense is good at this respect.  Moreover, some methods further consider the influence of vegetation, such as double layer model of farmland evaporation.

The methods only have their own reasons and localities.  Because of the limit of soil moisture capacity data that are needed for parameters calibrating, some models can not be spread all over China. Some methods are difficult to be put into actual application because they can not get the synchronous meteorological factors from satellite monitoring.  Because the various methods adopt different drought indexes, the various seasons can not be connected with the models.  As for the above-mentioned problems, the methods based on RS data still can not be put into application of drought monitoring.

However, it has a wide foreground of use microwave RS in measuring soil moisture capacity.  There is close relation between meson constants of the soil and soil moisture capacity, while the meson constants have a good relation with the dispersion coefficients of microwave back-direction.

Evaporation is not only determined by the meteorological conditions (including temperature, wind power, solar radiation and humidity), but also determined by soil moisture capacity (water supply capacity).  In hydrology, there is a mature 3-level model to simulate the process, which can relate evaporation with soil moisture capacity.  Otherwise, RS has got progress in monitoring watershed evaporation, which can not be directly measured. Therefore, the combination of multiple knowledge will break it through to use RS in monitoring soil moisture capacity and watershed evaporation, so that it will get into application and make a solid base for drought monitoring and evaluating.

7.5  INVESTIGATION OF SOIL LOSS

Soil corrosion is affected by natural factors and human being activities, which is not only involved with rainfall and runoff, but also has close relation with the factors of soil, lithology, geology, physiognomy, vegetation, landform, earth application and water system distribution.  And the RS technology is the best method of getting these macro informations.

According to the dynamical factors, soil corrosion can be divided into 3 kinds of water corroding, wind corroding and melted ice corroding; According to corrosion intensity, it can be divided into levels of acuity, extremely strong, strong, medium, light and tiny; According to the corrosion risk, it can be divided into 5 levels of destroy, extremely risk, risk, less risk and without risk.

The second and third wide investigations of soil corrosion over China were respectively made with RS technology in 1998 and 2001, by which we not only get to know the soil corroding conditions in the end of 1990s and at present, but also understand the benefits from various soil conservation measures in these years, compare the results of structure harnessing and biology measures.

The underlayer information received with RS technology is also the base for developing watershed sediment yields and sink sediment model.  With the development of RS technology, this kind of models have greatly considered underlying factor in these 10 years.  Combination of RS technology and math models can provide the dependable means for forecasting soil corrosion and soil conservation benefits.

7.6  INVETIGATION OF SEDIMENTATION IN RIVER MOUTH, RIVER CHANNEL, LAKE AND RESERVOIR

Since 1998, RS technologies have been widely used to investigate the dynamical change of river mouth, river channel and lake and sedimentation in reservoir.

RS images can provide the information of suspended sediment content.  The comparison of the images of low water period can reflect the change of sandbanks and shallows in the water bodies of river mouth, river channel, lake and reservoir as well as the change of water depth.

The Yellow River is the famous sandy river in the world.  The frequent changes of the sedimentation in the river bed cause the frequent changes of channel situation, which make a great threat to the protection of the dykes.  Therefore, it is an important task to use RS images to determine the channel situation of the middle and lower reaches of the Yellow River before flood period, especially in low water period.

The change of sedimentation in river channel and river mouth is important to channel structures and port construction.  The prominent work has been made with RS technology in the Nantong Reach of the Yangtze River, mouth of the Yangtze River and mouth of the Pearl River, which have plaid an important role in preventing sedimentation in river mouth and channel. RS images can not only record history, but also provide condition to analyze sedimentation change in time and space, which is one the RS advantages and it is necessary to mutually complement with hydrological data.

Sedimentation will make it change in reservoir storage year by year. It is basic necessary in reservoir regulation to understand these changes in timely and correct way, which is important for flood control, power generating and irrigation. Reservoir storage and storage curve can be determined with RS images of multi time phase and DEM before reservoir construction. By comparing with the method of global orientation system combining echo sounder measuring, the above-mentioned method has the advantages of fast and low cost.  In the view that the reservoir storage measurement has not been made for the most large- and middle-sized reservoir in China and the sedimentation condition is severe, although the method is not good in precision, it is convenient and effective. For example, it is successful to measure the reservoir storage curves of Xinanjiang Reservoir and Fengman Reservoir with RS images of multi time phase. As for the lakes, the results of the landform measuring under water can used as DEM to measure lake storage change and relationship between storage capacity and water level. All these show a development of application of RS technology in water conservancy in recent 10 years.

To sum up, RS technology as a substitution of traditional means has been widely and deeply applied in hydrology and water resources management in recent years. As an advanced and effective means, RS technologies have been understood by more and more hydrologists. In order to let more hydrologists use RS technology and put into development of RS application in Water Conservancy, the problems should be settled on how to put RS technology into further application.  There are 80% of the information that human being have touched involves with time and space, all which can be received by the means of observing earth. It can be affirmed that RS technology will be necessary means to solve the most problems from hydrology and water resources in this century.

REFERENCES

[1]     Cai Chongfa, Ding Shuwen, Shi Zhihua et al (2000), Research on forecasting watershed soil corrosion with USLE Model and IDRISI, Transaction of Soil Conservation (in Chinese).
[2]     Chen Fangyun (1999), Satellite system for disaster control and relief, International Outer Space, (2): 1-2 (in Chinese).
[3]     Chen Shu et al (2000), Introduction to GIS, Beijing: Science Press (in Chinese).
[4]     Chen Shupeng, Tong Qingxi, Guo Huadong (1998), Research on the Mechanism of RS Information, Beijing: Science Press (in Chinese).
[5]     Cheng Xifang, Tan Bingqing, Evaluation and Analysis of Water Environment Quality and the Concerned Problems, a Speech at the 13rd Meeting of the Water System Pollution and Protection Science Information (in Chinese).
[6]     Cui Xinmin, Huang Ju, Li Yange (2001), Water resources management information system of shanxi province, Proceedings from the Workshop on Application of GIS Technology in Water Conservancy, Hohai University Press (in Chinese).
[7]     Du Mingyu, Gao Zhiqiu (1998), Research on radar reflection and precipitation estimating with various RS information, Nanjing Meteorology Tansaction, 21 (4) (in Chinese).
[8]     Fang Yu, Zhang Pu (1998), Research on the development of GIS software industry in China, Computer World, 21/D (in Chinese).
[9]     Fu Guobin, Li Lijuan, Liu Changming (2001), The scale in RS hydrology application, Development of Global Science, 16/6 (in Chinese).
[10]  Fu Guobin, Liu Changming (2001) The scale of the application of RS technology in hydrology, Advance in Water Science, 12/4 (in Chinese).
[11]  Furong Science and Technology Ltd (2000), Proceedings from the 4th Chinese User Meeting of ArcInfo/ERDAS, Beijing, Earthquake Press (in Chinese).
[12]  Gong Jianya (1999), Some Theories and Technology of Up-to-Date GIS, Press of Wuhan Surveying Technology University (in Chinese).
[13]  Hu Liangjun, Yang Qinke (2002), Fast quantitative evaluation of local soil loss based on RS and GIS, China Soil Conservation (in Chinese).
[14]  Huang Jiazhu, You Yuming (2002), Test of taking soundings with satellite RS in the Nantong Reach of the Yangtze River, Advance in Water Science”, 13/2 (in Chinese).
[15]  Huang Shifeng (1998), Initial analysis of flood disaster risk evaluating, Geography Research, 17 (in Chinese).
[16]  Huang Shifeng (2001), Theory and method of flood disaster risk analyzing, Proceedings from the Workshop on Application of GIS in Water Conservancy, Nanjing, Hohai University Press (in Chinese).
[17]  Huang Shifeng et al (2001), Systematic analyzing and designing of flood control command decision making suporting system based on GIS, China Report of GIS Engineering and Application, 1 (in Chinese).
[18]  Huang Shifeng et al (2001), The flood disaster risk analyzing based on GIS: A case in the Liaohe River Basin, Proceedings from the International Workshop on the Application of GIS in Water Conservancy, Hohai University Press (in Chinese).
[19]  Huang Shifeng, Zhong Shaonan, Xu Mei (2001), Index modeling based on GIS for estimating watershed soil corrosion, Transaction of Soil Conservation (in Chinese).
[20]  Huang Yifen, Dong Chaohua (2002), Feasibility test on the 940 nm channel RS of total vapor, Application Meteorology Transaction (in Chinese).
[21]  Huang Zhicheng (2001), The budding high-resolution commercial RS satellite, Transaction of China Images and Graphics, 6 (2): 22-27 (in Chinese).
[22]  Ke Changqing (2001), Research on the recent water body change in Dazong Lake base on maps and RS information, Ocean and Lake Bulletin, 2 (in Chinese).
[23]  Kong Yunfeng, Lin Hui (2000), The initial investigation of the development of GIS in China, Global Information Science, (2): 25-32 (in Chinese).
[24]  Li Fang et al (2001), Study on the information receiving model of soil moisture capacity, RS Information, 4 (in Chinese).
[25]  Li Jiren (2001), Application of GIS in monitoring and evaluating flood and waterlogging disasters, Proceedings from the International Workshop on the Application of GIS in Water Conservancy”, Hohai University Press (in Chinese).
[26]  Li Jiren (2001), Application of RS and GIS in flood control and disaster relief, Proceeding from the Meeting of 20 Years of RS Development in China, Beijing China, Meteorology Press (in Chinese).
[27]  Li Jiren (2001) Application of RS and GIS in flood control and disaster relief in China, Proceedings from the 22nd Workshop on RS in Asia, Singapore National University Press (in Chinese).
[28]  Li Jiren (1998), Application of RS in monitoring and evaluating of flood and waterlogging disaster in 1998, Chinese Spaceflight, 11 (in Chinese).
[29]  Li Jiren (2000), Establishing and application of operational running system of monitoring and evaluating large natural disasters, China Conservancy, 7 (in Chinese).
[30]  Li Jiren (1999), RS and water problem, RS of Territory Resources, 3 (in Chinese).
[31]  Li Jiren (1998), RS monitoring and evaluating of the flood occurred in the Yangtze River Basin in 1998, Transaction of the Water Resources and Hydro-Power Research Institute of China, 2/2 (in Chinese).
[32]  Li Jiren (2001), The running system of flood and waterlogging disaster monitoring and evaluating, Satellite Application, 9/2 (in Chinese).
[33]  Li Jiren (2001), Digital globe and digital water conservancy, Development of Water Conservancy and Hydropower Science, 1 (in Chinese).
[34]  Li Jiren (2001), Application of GIS in water conservancy, China Water Conservancy, 8 (in Chinese).
[35]  Li Jiren (1999), RS and development of water conservancy, Development of Science and Technology of Water Conservancy and Hydropower, 5 (in Chinese).
[36]  Li Jiren (2001), Application of 3S technology in water conservancy departments, Proceedings for Celebrating that China Water Conservancy Association Has Established for 70 Years (in Chinese).
[37]  Li Jiren (2001), The method and development of drought monitoring with RS system, Hydrology, 21/4 (in Chinese).
[38]  Li Xianglian, Chen Jinai (2002), Estimation of water storage regulating math model and flood control function in dongting Lake, RS of Territory Resources, 1 (in Chinese).
[39]  Li Yachun et al (2000), The research state and development of thermal flux mode in RS monitoring soil moisture in China, Agriculture and Meteorology in China, 21/2 (in Chinese).
[40]  Liu Changming, He Xiwu et al, Water Strategy of China in the 21st Century, Science Press (in Chinese).
[41]  Liu Chuang, Ge Chenghui (2000), Characteristics and application of the remote sensing data from MODIS of EOS in USA, RS Information, (3) (in Chinese).
[42]  Liu Nan et al (2000), Status and charateristics of GIS in China, Global Information Science,  (2): 20-24 (in Chinese).
[43]  Liu Qiyuan, Liu Yi (2000), Safety of Data Base and Information System, Beijing: Science Press (in Chinese).
[44]  Liu Ruimin, Wang Xuejun (2001), Application of RS and GIS in studying the water quality in the inland lakes, Environment Science and Technology, 24/1 (in Chinese).
[45]  Lu Jiaju (2001), Analyzing the influence of reclaimed area in reservoir region with Multi Time Phase RS Data, RS Information, 3 (in Chinese).
[46]  Ma Tiemin, Shao Lanxia (2001), Establishing and application of the RS hydrological model for the Huifahe River Basin in Jilin Province, Transaction of North China Normal University, 35/4 (in Chinese).
[47]  Ministry of Water Resources, PRC (2002), Report of soil loss all over China (in Chinese).
[48]  Nanjing Hydrology and Water Resources Institute, Ministry of Water Resources (1999),  Water Supply and Demand of China in 21st Century, Water Resources and Hydropower Press (in Chinese).
[49]  Office of the IT Leading Group, Ministry of Water Resources (2001), Outline of the 10th “Five-Year Plan” and 2010 Plan in Jinshui Project (in Chinese).
[50]  Pan Xizhe, Zhang Jianguo(1998), Consider the construction of RS satellite data source in China, Satellite Application, (2): 1-6 (in Chinese).
[51]  RS Center of China Water Resources and Hydropower Institute (2000), High spectrum remote sensing of the water body in the guanting water system, Research Report (in Chinese).
[52]  RS Center of China Water Resources and Hydropower Institute (2001), The information data base of china water environment, Technology Summary Report (in Chinese).
[53]  Shen Guangrong, Tian Guoliang (2000), Research on crop shortage of water index model with RS monitoring drought disaster based on GIS for the plain around the Yellow, Huaihe and Haihe Rivers, Zoology Transaction, 20/2 (in Chinese).
[54]  Shuang Chengfei, Li Hao (2000), Software Engineering Management, National Defense Industry Press (in Chinese).
[55]  Soil Conservation Monitoring Center, Ministry of Water Resources, RS Application Institute of CAS (2001), Technical report on the second investigation of soil Corrosion with RS in China (in Chinese).
[56]  Song Guanfu, Zhong Ershun, Wang Erqi (1998), WebGIS——GIS based on internet, Transaction of China Images and Graphics, 3 (in Chinese).
[57]  Song Guanfu, Zhong Ershun, Wang Erqi (1998), WebGIS——GIS based on internet, Transaction of China Images and Graphics, 3 (in Chinese).
[58]  Song Guanfu, Zhong Ershun (1998), Research and development of component-GIS, Transaction of China Images and Graphics, 4 (in Chinese).
[59]  Song Guanfu, Zhong Ershun (1998), Research and development of component-GIS, Transaction of China Images and Graphics, 4 (in Chinese).
[60]  Song Guanfu (2000), Research on component-GIS information, A Research Report from the Postdoctoral Students in Remote Sense Institute of CAS (in Chinese).
[61]  State Remote Sense Center of Science Ministry (2000), GIS and Management Decision Making, Beijing: Press of Peking University (in Chinese).
[62]  Sun Zengyi, Wang Yizhong (2002), Application of water quality telemetering in water environment protection (in Chinese).
[63]  Wan Hongtao et al (2001), A Review on the research of the integration between GIS and hydrological model, Advance in Water Science, 12/4 (in Chinese).
[64]  Wang Xiaobin et al (2001), Analysis of cloud water quantity and characteristics in the precipitation system during winter and summer in Beijing, Application Meteorology Transaction, 12/21 (in Chinese).
[65]  Wang Yunpeng et al (2001), The method of remote sensing water body pollution and the application in monitoring water pollution in the Guangzhou Reach of the Pearl River, RS Transaction, 5/6 (in Chinese).
[66]  Wei Yiming et al (1999), Comprehensively integrating method of flood disaster analyzing and evaluating, Advance in Water Science, 10 (1) (in Chinese).
[67]  Wu Lun et al (2001), GIS: Theory, Method and Application, Beijing: Science Press (in Chinese).
[68]  Wu Peizhong (1999), Characteristics and application of satellite-borne high spectral imaging spectrograph, RS of Territory Resources, 41 (3) (in Chinese).
[69]  Wu Qinxiao, Yang Wenzhi (1998), Vegetation construction on Loess Plateau and sustainable development, Beijing: Science Press (in Chinese).
[70]  Wu Quanyuan (2001), Analysis of development potential of water resources in Jiaodong Area with RS and GIS, RS Technology and Application, 16/3 (in Chinese).
[71]  Xie Xinmin, Jiang Yunzhong et al (2002), Research on the management system for real time monitoring watershed water resources, Water Problem Forun (in Chinese).
[72]  Xiu Wenqun, Chi Tianhe et al (1999), City GIS, Beijing Hoping Electronic Press (in Chinese).
[73]  Xu Youpeng et al (2001), Research on the application of GIS in watershed flood control and disaster relief system, Proceedings from the Workshop on Application of GIS in Water Conservancy, Nanjing: Hohai University Press (in Chinese).
[74]  Yang Cunjian (1999), Pick-up of the RS special information based on SAR, Doctor Papers from CAS (in Chinese).
[75]  Yang Shizhi (2002), Optical RS in monitoring water quality, Photoelectron Technology and Information, 15/1 (in Chinese).
[76]  Zhang Jianpei (1999), Data Base Principle and Application System Development, Water Conservancy and Hydropower Press of China (in Chinese).
[77]  Zhang Jianping, Ren Fuji, Ye Rongping et al (1999), Application of GIS and MapInfo, Science Press (in Chinese).
[78]  Zhang Renhua et al (2001), Difference of quantitative RS reflection between crop evaporation and soil moisture using rate in areas, China Science 31/11 (in Chinese).
[79]  Zhang Xingnan et al (1998), Knowledge library of flood control decision making for the Middle and Lower Reaches of the Huaihe River, Hydrology, 4 (in Chinese).
[80]  Zhao Dongzhi (2001), Development of satellite RS monitoring of equatorial tide disaster in China, National Ocean Environment Monitoring Center (in Chinese).
[81]  Zhao Xiaoli, Zhang Zengxiang, Wang Changyou et al (1999), Dynamical monitoring soil corrosion in middle areas in Tibet Base on RS and GIS, Transaction of Soil Corrosion and Soil Conservation, 5 (2): 44-50 (in Chinese).
[82]  Zheng Binghui, Wang Qiao (2000), Status and prospect of the environment RS application, Spacelight and National Economy, 9 (in Chinese).
[83]  Zhong Ershun (1999), Review of GIS multi-source data integrating mode, Proceedings from 99' China GIS Annual Meeting, Shenzhen (in Chinese).
[84]  Zhou Chenghu, Luo Jiancheng, Yang Xiaomei, Yang Cunjian et al (1999), Understanding and Analysis of RS image Physiography, Beijing: Science Press (in Chinese).
[85]  Zhou Chenghu, Wan Qing, Huang Shifeng et al (2000), Research on zoning of flood disaster risk based on GIS, Geography Transaction, 55, (1): 15-23 (in Chinese).

[86]  Zhou Zhiying (1999), Modern Software Engineering, Science Press (in Chinese).


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