Urban Green Space and Wetland Dynamics by Urbanization Impact: Protective Perspective by Present Monitoring Laws on Municipality

Abstract

Water body and green space is very important elements of ecosystem to keep functioning 
of urban environment and to make relaxed of urban life. This study is an effort to detect
the wetland and green space changes by the urbanization impact in savar municipality, 
Bangladesh. The changes of the important environmental issues are addressed here by the 
existing rules and regulations. In the methodology both the primary and secondary data is 
used to identify the urbanization impact and land use dynamics on urban agricultural 
land and wetland. From the USGS satellite (landsat 5 thematic mapper-TM) for the year of 
1996, 2007 and 2018 data is used. Using a supervised classification algorithm, from a set of 
satellite images the land use change data were extracted. Producer’s accuracy, user’s 
accuracy, overall accuracy and kappa coefficient model is used to check the accuracy of 
the classified images and deriving all of the model the accuracy is about 80% and it means 
it is substantial agreement of the accuracy. The result exposed that agricultural land and 
green spaces and water body of savar municipality has gradually decreased and last 
twenty years (1996 to 2018) about 385 ha agricultural and urban green space is lost and 
about 171 ha water body is lost. Urbanization rate and build up area is significant factor to 
lose the green spaces. The reduction of water body and agricultural or green space is 
attributed due to the implementation of existing rules and regulations. In order to ensure 
sustainable water body and green spaces in the municipality the laws should be executed 
for appropriate working of the municipality’s environment.