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Forestry
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The comprehensive inventory and monitoring
of forest and other renewable natural resources
by means of
Remote Sensing data
in the 'Three Norths' shelter forest region
Objective and working procedures
The objective of the project is to investigate the categories, distribution area and survival rate of the shelter forest; the quantity, quality and distribution of pasture land; as well as the types, distribution, quantity, quality and the current utilization status of the land resources by employing space-born remote sensing techniques in the 'Three Norths' region. On this basis, a resource and environment information system is to be established.
To realize the objective, the project includes the following contents:
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The serial thematic maps on the scale of 1:100,000 should be compiled with country as mapping unit by space-born remote sensing images. The serial thematic maps consist of forest distribution map, forest dynamic distribution map, forest site map, grassland type map, grassland classification map, land use map and land resources evaluation map. On this basis, maps on the scale of 1:500,000 should be compiled with province as mapping unit. These maps include forest distribution map, forest site map, grassland resource map, land use map and land resources evaluation map. At the same time, the above mentioned maps on the scale of 1:1,500,000 should be also compiled for the whole 'Three Nroths' region.
- Statistical analysis on renewable resources of major afforestation counties should be submitted. The statistical data should be calculated and obtained from thematic maps one the scale of 1: 100,000. The emphasis of resources analysis is to scientifically evaluate the suitability of afforestation and status of administration of various districts through comparison and analysis of survival rates of afforestation and grass-planting, and in the mean time, to deliver analysed results about the ecological benefits of the shelter forest.
- The resources and environment information and its dynamic monitoring system are to be established for the whole 'Three Nroths, region as well as for typical counties, for the realization of scientific management, dynamic monitoring and predictive analysis of forest and other renewable resources.
- Basic research and advanced research of remote sensing techniques are to be exploited, which includes the researches of spectral characteristics of objects, image processing, information system, expert system, analysis model and computer-aided cartography,. Such work would create conditions for setting remote sensing projects on a new level.
The project has been practiced according to the following steps:
- The first stage ( 1986). For the successful implementation of the comprehensive remote sensing inventory in the whole 'Three Norths' region, a typical experimental area was selected, so that the key problems concerning technical schemes and technical regulations for the project were studied and solved.
- The second stage ( 1987). The 'Three Norths' areas was divided into 6 category region according to their natural and economic conditions. Within each category region, 1-3 typical counties were selected to carry out remote sensing inventory experiments. The details of the technical scheme and regulations were drawn up on the basis of the characteristics of category region, thus to create conditions for the overall implementation of comprehensive remote sensing inventory.
- The third stage ( 1988-1989). Field investigation and serial mapping were to carry out in the whole 'Three Norths' region.
- The fourth stage (1990) . The serial mapping has been completed. The resource and environment information system for the 'Three Norths' region is being constructed.
More than 60 institutions took part in the project including Chinese Academy of Forestry, 9 research institute of Chinese Academy of Sinica, more than 20 colleges and universities, Chinese Academy of Agriculture, Forest Planning and Design institute, National Mapping Bureau, and local remote sensing research depths. The number of scientists concerned exceeds 300. At present ,the whole project has been basically completed, and will pass the state appraisal at the end of this year.
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