Environmental evaluation of marshes zone using remote sensing and GIS techniques

Dissertant

Ulwan, Muzahim A. al-Karim

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Ph.D.

Degree Date

2006

English Abstract

Satellite sensors are now providing a huge number of time series of remotely sensed image of earth's surface.

There is an increasing need for improved techniques to extract information about the earth ecosystems from these remotely sensed data, because remote sensing is the only comprehensive approach to monitor the global environment.

However, until recently, there have been few studies on the techniques for monitoring complex natural ecosystems such as wetlands.

This thesis investigates new remote sensing techniques for evaluation of the structural member (Ferro cement) for constructing low cost housing in south of Iraq marshes .To evaluate the Ferro cement material it is found that this material is suitable for constructing habitat in the marshes because of the good durability of Ferro cement and their decrease in strength due to salinity is low, together with economic factors.

The results of the water tests for study area can be described by the conductivity value, and total dissolved solid (TDS) according to US salinity laboratory, the kidney is from the category (C3, C4).

The results of dissolved oxygen in water give impression that the concentration of dissolved oxygen is between medium to high.

While the soil samples tests offer an impression that the soil is "silty loam" with low gypsum percentage according to USDA soil classification system.

The map features within the region study have been extracted to construct the required GIS database of the region using different sets of Landsat satellite images (MSS, TM, and ETM+) during the period (1973-2004), several image processing operations have been implemented like geometric correction, mosaicking, spectral enhancement and supervised classification, moreover wide range of supported data like previous topographic map (1 / 50000, 1 / 100000, 1 / 250000) updated by surveying field works was used in this work.

From the image processing analysis, it is concluded that the water surface class was large in year 1973 after that it decreased significantly until it reached its minimum level in year2000, after that a simple increment has been recorded during 2003-2004.

The dry land was as large as possible in 1990 afterwards it decreased, in 2003 dry land increased to its recorded level in 1990.

The wet land decreased from 1973 to 2003 but it increased in 2004.

The marsh vegetation's (dense, medium, and sparse) decreased in area from 1973 until 2003, but in 2004 they increased slightly.

Main Subjects

Civil Engineering

Topics

• Swamps
• Iraq
• Reinforced concrete
• Geographical information systems

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305755