Grass resources investigation with Remote Sensing in lichuan country
Sun Jiabin, Lu Jian, Guan Zequn and Ma Jiping
Sun Jiabin, Lu Jian, Guan Zequn and Ma Jiping
Wuhan Technical University of Surveying and Mapping
Wuhan, China
Abstract
In the test area of Lichuan country of Hubei province in China, we used multi data (spectral, textural and non-remote sensing) to investigate and evaluate the grass resources. Its reliability is more than 90%. This paper describes the results of the research which will provide a scientific for the local government to develop and utilize grass resources and to plan, and mange livestock farms.
General situation of test region
We select Lichuan country of Hubei province in China as a test area. It is located in El 108021' to 109019' and NL 29042 to 30040'. The number of image lines are from 1650 to 5749 and number of pixels from 620 to 3767 in Pss-Row of 126-39. TM. It is at the intersection of Daba and Wulin mountains. It is located in the wet climatic zone of north subtropical zone an south temperate zone. Spring is later and autumn is earlier than that of other areas. Its area is 4612 km2. The highest elevation point is 2041m and the lowest elevation point is 315m. However most land is between 1000m - 2000m. The climate and plants appear vertically different distribution. Usually crops are the staple plants intermingled with forest and waste land in the area lower than 1200m. There are barren hills, brush covered slopes and grasslands, except that the woodlands and farmlands appear in the area higher than 1200m. Large grassland with area more than 7000 ha. are distributed on the wide and smooth top of mountain and mountain slopes. There are various kinds of lush grasses growing, which are suitable for developing large livestock farms.
Grassland taxonomy in the south of China
The international taxonomy of the grassland in southern part of china can be classified on 3 levels - CLASS, GROUP, TYPE.
At the first level grassland is divided into 5 classes :
(1) Grassland
(2) Bush-grassland
(3) Wood-grassland
(4) Meadow
(5) Odd Pieces of grassland.
There are only three classes (1), (2), (3) in Lichuan Country.
At the second level every class is divided into 3 groups :
(1) High mountain group, in which the terrain is higher than 1200m.
(2) Mid-mountain group, in which the terrain is between 800m and 1200m
(3) Low mountain group, in which the terrain is lower than 800m
At the third level grassland TYPEs are determined on the basis of grass format.
