EXTRACTION OF NON-POINT POLLUTION USING SATELLITE IMAGERY DATA
: tan (Chal
Sang-Ik Lee“, Yun-Soo Choi", June-Hwan Koh®
? National Institute of Environmental Research Environmental Research Complex, Kyungseo-Dong, Seo-Gu, Incheon 404-170,
Korea, moers(@me.go.kr
b Department of Geoinformatics, University of Seoul, Siripdaegil 30 Dongdaemun-Gu, Seoul 130-743, Korea, choiys@uos.ac.kr ,
jhkoh(Zuos.ac.kr
MILII
Abstract: Land cover map is a typical GIS database which shows the Earth's physical surface differentiated by standardized
homogeneous land cover types. Satellite images acquired by Landsat TM were primarily used to produce a land cover map of 7
land cover classes; however, it now becomes to produce a more accurate land cover classification dataset of 23 classes thanks to
higher resolution satellite images, such as SPOT-5 and IKONOS. The use of the newly produced high resolution land cover map
of 23 classes for such activities to estimate non-point sources of pollution like water pollution modelling and atmospheric
dispersion modelling is expected to result a higher level of accuracy and validity to various environmental monitoring results.
Keywords: Land Cover Map, Non-Point Source of Pollution
1. Introduction
In this study, described about Ministry of Environment's
Land cover classification system that widely used a Remote
Sensing technology and a Geographic Information System
technology all over the world.
Also, achieved modelling that selects the pollution load
estimation model present, practical use possible and applies
land cover map to Kyungan River basin of attraction. And then,
examined the pollution load estimation possibility that utilize
land cover map through comparative analysis with existing
study finding.
2. Land Cover Map
Land Cover Map refers to typical GIS-DB that expresses sort
form as terrain feature of land surface according to fixed
ecological standard and has homogeneous special quality in
form of map.
This map is used to basic data of various field such as non-
point source of = pollution Estimation, urban planning,
atmospheric dispertion modeling and natural environmental
management because reflect best present circumstance of
ground surface.
1) Class of Land Cover Classification
Class of land cover classification can establish very variously
according to practical use purpose. In this study, composed to
23 items so that can basically reflect ecological special quality
of land surface and utilize on whole environment business as
Non-Point Source of Pollution estimation, space planning and
basic data of various models.
l. Name of each item was examined American USGS
classification system and European Union's CORINE project,
and then decided the names that consider of various land
surface and small Patch size that is caused by topography and
climate.
>
2. Considered ratio of areas and seasonal special quality that
each classification item is occupying.
3. In all-out plan of country dimension roll important position
do item that is useful in knowing modelling and monitoring
business choose.
4.Collected various opinions within extent of environmental
management business.
Table 1. Category of Land Cover Classification.
Level 1 Level 2
Category Name Code Category Name Code
Habitation units 110
Industrial units 120
: Commercial units 130
thin Sling To Recreational units 140
Transport units 150
Public units 160
Rice fields 210
Crop fields 220
Agricultural areas 200 House crop fields 230
Orchard 240
The others 250
Broad-leaved ^
310
Forests 300 forest
Coniferous forest 320
Mixed forest 330
Natural grassland 410
Grassland 400 Golf course 420
The others 430
Inland wetlands 510
Wetlands 300 Coastal wetlands 520
Mine sites 610
Barren 600 The others 620
: Inland Waters 710
Water bodies 700 Marine:waoters 720
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