Category: Emerging and Innovative Technologies

394055 - Application of GIS and Remote Sensing for identification of potential runoff harvesting sites: A case study of Karoonjhar mountainous area, Pakistan

Tuesday, Jun 5
8:30 AM – 5:30 PM

The Karoonjhar mountainous area, situated at the southeast corner of Thar Desert, Pakistan faces water scarcity most of the year due to erratic rainfall and limited groundwater resources. Though the area receives sufficient rainfall during the monsoon period but water is not conserved in small dams and ponds for later use during the dry periods. One major challenge in implementing these runoffs harvesting techniques is the unavailability of data regarding runoff generation and lack of studies identifying suitable conservation sites. Looking at the gravity of the problem, the present study was conducted to delineate watersheds, quantify runoff, and identify potential runoff conservation sites in Karoonjhar Mountainous area using Remote Sensing and GIS tools. Primary data was collected through ground trothing survey and soil sampling, while secondary data about rainfall was obtained from Pakistan Meteorological Department (PMD). The 30-m resolution Digital Elevation Model (DEM) was acquired from the Japan Aerospace Exploration Agency (JAXA). The data was processed in ArcGIS 10.3 and HEC-Geo HMS for the required objectives. The present study revealed that the probability of return period of a rainstorm of 52.5 mm was highest i.e., 1.78 years. For a single rainstorm event of 52.5 mm, runoff generated at Karoonjhar mountainous area was about 7055 acre-ft (AF). Thirteen small watersheds with a total area of about 82314 acres were delineated for runoff harvesting. The curve number (CN) of the study area ranged from 54 to 100. Based on the historical rainfall data, runoff volume of about 21165 AF could be generated during entire monsoon period. Results from the present study provide valuable information to water managers and decision makers that can be used to identify location and size of water harvesting structures such as small dams and ponds.

Co-Authors: Altaf Sial, Pakistan – Mehran University of Engineering and Technology, Jamshoro; Dhanji Misrani, Pakistan – Mehran University of Engineering and Technology, Jamshoro; Ghulam Dars, Pakistan – Mehran University of Engineering and Technology, Jamshoro; Ajay Kalra, USA – Southern Illinois University, Carbondale; Sajjad Ahmad, USA – University of Nevada, Las Vegas

Sajjad Ahmad

University of Nevada Las Vegas
Las Vegas, Nevada

Dr. Sajjad Ahmad is a Professor in the Department of Civil and Environmental Engineering and Constructions at University of Nevada, Las Vegas. His current research interests are in evaluating the impact of climate variability and change on hydrologic cycle, water-energy nexus, probalistic forecasting and downscaling, and integrated water resources management.