Prediction of pollution from spectral reflectance

Dissertant

Muhammad, Muhammad Rafiq

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Master

Degree Date

1999

English Abstract

In this study, the prediction of pollution using one of remote sins techniques was depended.

The spectral reflectance of water at the r Lk 0 45-0 52urn, 0.53~0.61umN 0,62-0.69pm, and 0.7S-0.91um that ^respond to Landsat Thematic Mapper TM1, TM2, TM3 and TM4 was utilized to predict the amount of some water quality parameters in Tigris River These parameters are turbidity, alkalinity, chloride, hardness, sulfates total dissolved solids (TDS) and suspended solids (SS).

Reflectance of water was measured opposite to five treatment Hants in Baghdad at the mentioned above bands.

These plants are 7-Nissan Al-Karama, AU Withal, Al-Qadisiyat and Al-Dora plant.

The xXctance measurement, were taken at four days 21 / 4 / 1999, 18 / 5 / 1999, 10 / 6 / 1999 and 5 / 7 / 1999 using a portable radiometer These measurements were used, along with the laboratory results for the tests of the seven parameters for the same days, to construct regression models that link between the parameters (one at a time) and reflectance data.

An expert system then was built to make use of these models to calculate the value of any of the parameters from given values of reflectance and give the decision that the water is polluted with that parameter or not, Applying stepwise regression method, the turbidity and suspended solids were proved to be strongly presented at the bands utilized in the study, while alkalinity, and chloride were not.

That can be clearly seen from the statistical analysis results of the coefficient of determination < R"2) and F-test.

The rest three of the seven parameters failed to be presented in any model Two modest were obtained for turbidity with RA" of 0.875 for the first model and 0.903 for the second and F was equal to 126.269 with significance of zero for the first and 78.746 with zero significance forte second Also two models were obtained for suspended solids with Kit 0.970 for the first model and 0.977 for the second and F was equal to 589.983 with significance of zero for the first and 364.194 with zero significance for the second.

The first model for both turbidity and suspended solids were depended.

A single model was obtained for alkalinity with R-2 of 0.428 and F was equal to 13.458 with significance of 0.002.

Also a single model was obtained for chloride with RA 0.460 and F was equal to 15.347 with significance of 0.001.

Main Subjects

Earth Sciences, Water and Environment

Topics

• Pollution
• Water
• Iraq

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-306246