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The Applica tion of the D istr ibuted Eco-hydrolog ica lModel TOPOGin a Mounta inous Sma llWa tershed of Tempera te Zone:A Ca se Study in the Sma llWa tershed of Pa ilugou in Qilian Mounta ins

  • Received Date: 2006-11-06
  • TOPOG model is an eco-hydrologicalmodel designed during forest hydrological studies with small watersheds in trop ical region. In order to test the app licability of TOPOG for simulating the hydrological effects of forestsin smallwatersheds of temperate zone, the meausered eco-and hydrological data in the growing seasons of 2001 and2002 in the small watershed of Pailugou in Qilian Mountains were selected to simulate the hydrological p rocessessuch as canopy intercep tion, evapotransp iration of different vegetation types and watershed runoff by using the“yield”mode of TOPOG. It showed that the canopy intercep tion simulated matches the measured well when therainfall amount of single rainfall events varies within 5~25 mm, and the total evapotransp iration as well as theircomposition from the forest stands of Picea crassifolia which grow within the elevation range of 2 730~3 100 m couldbe more accurately simulated; for the grasslands growing within the elevation range of 2 700~2 800 m on sunnyslopes, their evapotranp iration could also be well simulated by TOPOG; the calculated runoff volume during growing seasons from the small watershed was close to the measured values.
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The Applica tion of the D istr ibuted Eco-hydrolog ica lModel TOPOGin a Mounta inous Sma llWa tershed of Tempera te Zone:A Ca se Study in the Sma llWa tershed of Pa ilugou in Qilian Mounta ins

  • 1. Research Institute of Forestry Ecology, Environment and Protection, CAF
  • 2.  Key Laboratory of Forest Ecology and Evironment, State ForestryAdministration, Beijing 100091, China
  • 3. Tourism College of Guilin University of Technology, Guilin 541004, Guangxi, China
  • 4. Academy ofWater Resources Conservation Forests in QilianMountains of Gansu Province, Zhangye 734000, Gansu, China

Abstract: TOPOG model is an eco-hydrologicalmodel designed during forest hydrological studies with small watersheds in trop ical region. In order to test the app licability of TOPOG for simulating the hydrological effects of forestsin smallwatersheds of temperate zone, the meausered eco-and hydrological data in the growing seasons of 2001 and2002 in the small watershed of Pailugou in Qilian Mountains were selected to simulate the hydrological p rocessessuch as canopy intercep tion, evapotransp iration of different vegetation types and watershed runoff by using the“yield”mode of TOPOG. It showed that the canopy intercep tion simulated matches the measured well when therainfall amount of single rainfall events varies within 5~25 mm, and the total evapotransp iration as well as theircomposition from the forest stands of Picea crassifolia which grow within the elevation range of 2 730~3 100 m couldbe more accurately simulated; for the grasslands growing within the elevation range of 2 700~2 800 m on sunnyslopes, their evapotranp iration could also be well simulated by TOPOG; the calculated runoff volume during growing seasons from the small watershed was close to the measured values.

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