Measurement Systems in the Hapex-Mobilhy Regional Evapotranspiration Experiment

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by Richard H. Cuenca, Oregon State Univ, United States,

Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century:

Abstract: The HAPEX-MOBILHY (Hydrologic-Atmospheric Pilot Experiment - Modelisation du Bilan Hydrique) regional evapotranspiration experiment was conducted in the south-west of France during the spring and summer of 1986. The measurement systems included: a) neutron probe monitoring of soil moisture content; b) energy balance stations; c) masts to measure profiles of humidity, temperature and wind; d) Bowen ration station; e) eddy correlation station above a forest canopy; f) weighing lysimeter; g) atmospheric soundings with balloons for temperature, humidity and pressure profiles; h) stream gaging and water table monitoring; i) aircraft equipment with remote sensing instrumentation; j) aircraft equipped with water vapor flux measuring instrumentation; and k) LANDSAT and SPOT satellites. This paper focuses on the ground-based measurement systems and the differences in time and spatial scales involved. A description of measurement techniques and comparisons of results for particular systems are given.

Subject Headings: Evapotranspiration | Temperature measurement | Soil water | Pressure measurement | Energy measurement | Gaging stations | Hydrologic models | Wind power | France | Europe

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