Home > Geospatial Application Papers > Environment > Overview


Environmental land use Change detection and assessment using with multi-temporal satellite imagery


According to the obtained results the rate of impact due to land use changes are classified into 4 distinct classes as very high impact, high impact, medium impact, low impact.

The results of study also revealed that during the years of 1989-1998 the total area of about 879912 hectares caused environmental impact. Table 3 shows the results of changed area based on loss Index.

Table 3: changed area based on Environmental Impact Index
Variable Area (hectare) Percent
Low Impact 902.75 10.2
Medium Impact 7033.77 80
High Impact 247.77 2.81
Very High Impact 615.06 6.99
Total 8799.12 100

Considering the above table about 615.06 hectares of these changes were due to development of settlements as well as constructed lands over orchards, which occurred mostly on the urban fringe of Bonab and Maragheh towns and are of high impact. About 247.77 hectares of these changes mostly are related to changes due to construction and settlements build on agriculture land around Maragheh, which are recognized as an environmental impact. About 7033.77hectars of these changes, which are related to the natural resources and vegetation cover in the area are classified as moderate impact. Around 902.57 hectares of the land use changes in the area are classifies as low impact (low harm) that includes those changes due to extension and transgression of the eastern coast of Uromia lake. Fig 3 shows the final result after applying the environmental impact index in the study area.


Conclusion:
The results of study disclose two major distinct land use changes occurring in the area as followings:
  1. those changes due to the extension of Uromia Lake, which develops wetlands and saline lands aroud the lake altering the vegetation, cover.
  2. changes caused by development of industries, population growth, and construction of Alavian dam in northern part of Maragheh, and development of residential area. The results of research revealed that this type of changes have the most environmental impact in the area so that the continuation of such a trend may endanger the surrounding land as well as the orchards in the area. So it is recommended to protect this critical area.
Reference:
  • Jensen J.R, “Introductory Digital Image processing”, (1986).
  • F. Sunar,”An Analysis of changes in a Multi - data set; a ease study in the Ikitelli area Istanbul Turkey”, Int, J, Remote Sensing, (1998). Vol.19.
  • A.Parakash and R.P Gupta,”Landuse mapping and change detection in a coal minnig area, a case study in the Jharia coalfield, India”, Int. J. Remote sensing (1998). Vol. 19.
  • M.F.Makhdoum, ”Fundamental of land use planning “, Tehran University 1994.
Page 4 of 4
| Previous |