Effects of land-cover change on rainfall-runoff relationships: A case study of the Yarkon-Ayalon watershed, Israel

Noa Ohana, Arnon Karnieli, Roey Egozi, Aviva Peeters

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Temporal changes and spatial patterns are often studied by analyzing land-cover changes (LCCs) using spaceborne images. LCC is an important factor, affecting runoff regime within watersheds through processes such as urbanization, agricultural activities, quarries and afforestation. The objective of this research was to estimate the effects of 20 years of LCCs on rainfall-runoff relations in an extreme rainfall event, in a sub-basin scale. A Landsat TM-derived classification map was used as an input for the Kinematic Runoff and Erosion (KINEROS2) hydrological model along with precipitation data of an extreme rainfall event. Model calibration was performed by using total runoff volume data based on hydrometric measurements taken during this rainfall event. Validation of the model performance was conducted by comparing the model results to measured data in order to receive output accuracy estimation. A similar procedure was then used with a 2009 land-cover classification map, derived from a Landsat TM image, as an input to KINEROS2 model, along with the same precipitation data and calibration parameters, in order to understand the possible outcomes of a rainfall event of such magnitude and duration after 20 years of LCCs. The results show a slight increase in runoff volume and peak discharge values between the examined time periods as a result of LCCs. In addition, a strong relationship was spotted between vegetation cover along the six sub-basins and the runoff volume. The LCCs that had the most pronounced effects on runoff volumes were related to urbanization and vegetation removal.

Original languageEnglish
Title of host publicationFirst International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2013
DOIs
StatePublished - 16 Sep 2013
Event1st International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2013 - Paphos, Cyprus
Duration: 8 Apr 201310 Apr 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8795
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference1st International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2013
Country/TerritoryCyprus
CityPaphos
Period8/04/1310/04/13

Keywords

  • GIS
  • Hydrological Models
  • Landsat
  • Remote Sensing
  • Spatial Analysis
  • Watershed

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