Abstract:
Ecosystem service and disservice components have a great impact on the
environment as well as on urban life. The aim of the research is to assess the
impact of ecosystem services and disservices by tracking the change over a span
of 15 years (2005-2020) using satellite image analysis. It was conducted in
wards 23 and 29 of Khulna City Corporation (KCC), an area adjacent to the river.
The overall work breakdown has been rounded up in a methodological
framework which cleaved into two parts focusing on ecosystem services,
disservices and multispectral image analysis steps. Multispectral image analysis
has been done using Normalized Difference Vegetation Index (NDVI) and
Normalized Difference Build-up Index (NDBI). On the other hand, geospatial
analysis has been done using Digital Elevation Model (DEM), Service Area
Analysis (SAV) and other mapping tool including Geographic Information
System (GIS) to show the changed impact of both ecosystem components. The
study areas attain provisioning, habitat, cultural and regulatory service
components and the disservice elements have been sorted out according to
sources. Comparative study showed increase in the buildup area; vegetation
coverage because of increasing vegetation, cultivation and gardening practices;
good weather and water circulation condition and water body conservation
which has significant positive impact on the area. The disservice component like
poor drainage condition and solid waste management system and risky
infrastructures have negative impact, need to address for the betterment of
residence and environment.
