Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Study of the Spatio-temporal Changes of Hail Haor Using Remote Sensing and GIS Techniques

A. Z. Md. Zahedul Islam
SPARRSO, Dhaka

S. M. Humayun Kabir
SPARRSO, Dhaka

M. Nur Hossain Sharifee
SPARRSO, Dhaka

Syed Hafizur Rahman
SPARRSO, Dhaka

Zia Ahmed
Dept. of Environmental Sciences, Jahangirnagar University

Abstract/ Executive Summary:

This paper has focused on the multitemporal changes of the surface features of the Hail hoar wetland. The study was carried out using integrated technology of Remote Sensing (RS), Geographic Information System (GIS) and ground truth verification. Four sets of satellite data covering 1975-2014 time period were used for the study. The main wetland surface features identified in Hail hoar were water body and rice crops (Aman and Boro). The study revealed that the extents of all these surface features have been changed with specific trends. Extent of water area in dry season has been decreased and that in the wet seasons has been increased. The areas of Aman and Boro crops have also been changed with opposite patterns. These changes have upset the wetland characteristic of Hail hoar. Progressive increase of surface water in wet season made the hoar and its associate areas more vulnerable to flood. The decreasing tendency of dry season water area became alarming for the entire ecosystem of the haor region.

Keywords: Remote sensing, GIS, Hail hoar, Wetland, Change analysis, Aman, Boro

Location: Greater Sylhet district, Bangladesh

Start Date:

End Date:

Program Area: Resource Development and Management

Non-commodity: GIS, Remote sensing

Objectives:

To achieve this aim the following objectives were pursued: 1. Identification and estimation of the extent of main wetland surface features in Hail haor in temporal domain. 2. Analysis of the changes of Hail haor wetland and its surface features in temporal domain.

Methodology:

The study was carried out using integrated technology of RS-GIS-ground truth verification. Standard procedures of geo-referencing, image interpretation and on-screen digitization were used based on ERDAS Imagine software to generate the data layers mentioned. Refinement of the data layers based on field information were carried out. GIS analyses were carried out using ArcGIS software to reveal the seasonal and multi-temporal changes of the areas of water bodies and crops in the study area.

Source of Information: Dhaka University Journal of Earth and Environmental Sciences, Vol. 4, December 2015

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study revealed that the major wetland surface features in Hail hoar were water body and rice crops (Aman and Boro). The extents of all these surface features of Hail hoar were seen to changes with specific trends. The dry season water area has been decreased while the wet season water area has been increased. Due to continuous siltation processes, the haor area has been being filled up and perennial water area of the haor has been changed. Apart from disturbing the wetland characteristic of hail hoar these changes, particularly increase of wet season surface water, has been making the hoar and its associate areas more vulnerable to flood. The decreasing tendency of dry season water area has been becoming alarming for the aquatic species and for the entire ecosystem of the haor region. It is seen that the area of Aman rice had a decreasing tendency while the Boro rice area had an increasing tendency. Filed information supported that there are relationship between the changing patterns of water and crop areas. The increase of wet season water area has been disrupting the perennial Aman fields and reducing the Aman cultivation area. The reduction of dry season water area has been making available more areas for Boro cultivation. However, surface water of the hoar has been being used for Boro cultivation which, in turn, reducing the dry season water area of the Hail hoar.

Knowledge Management: Journal