XI WORLD FORESTRY CONGRESS

Antalya, Turkey, 13 to 22 October 1997


VOLUME 2, TOPIC 9


    DYNAMIC PROCESS MODELS AND EFFECT EVALUATION OF FOREST HYDROLOGY FUNCTION

    Ou Rungul, Ou Song, Wang Jiyong, Wong Youngde, Lin Hui 1

    Taking the forest status as the main characteristics of a basin system, this paper describes the dynamic process of forest hydrology action and deduces the hydrological dynamic-equilibrium equation and the hydrological action equation of the catchment system. At the same time, the mathematic models, which vary with time and space, of crown interception process, soil infiltration process, surface run-off formation process, natural process of water storage and water release, and ground-water output process have also been established. In order to make it easy to handle the data with a computer, the above successive process models have been discretized. Then the hydrological characteristic values and forest statuses in different periods are compared and evaluated by means of digital simulation. Therefore, the quantitative effects of forest action on hydrological control and water conservation are given.

    Keywords: Forest hydrologic effect, modelling, evaluation, hydrological simulation.

    1 Central South Forestry University, Zhuzhou, Hunan, China.



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