Dataset Listing

Bisley - Overland Water Chemistry, Nutrient Fluxes, Rainfall Chemistry, Throughfall Chemistry - Includes Weekly Rainfall flux (1988-2002)

Nutrient fluxes for rainfall and throughfall in the Bisley watersheds; Bisley Weekly Rainfall flux

Variables:  Throughfall Precipitation mm/day, pH, Conductivity, PO4-P, NH4-N, Na, K, Mg, Ca, Cl, NO3, SO4-S, SiO2, TD, For more details please see:

Standard Variables:  Calcium|Chloride|Electrical conductivity|Potassium, dissolved|Magnesium, dissolved|Sodium, dissolved|Nitrogen, NH4|Nitrogen, nitrate (NO3)|pH|Phosphorus, phosphate (PO4)|Silica|Sulfate, dissolved|Nitrogen, total dissolved|Precipitation

Date Range:  (1988-2002)

Dataset Creators/Authors:  Scatena, F.N.; IITF; Heartsil-Scalley

Contact:  Miguel Leon,

Field Area:   Bisley

Keywords & XML
  • Description

    Changes in the quantity and quality of precipitation as it passes through vegetative cover are important components of both hydrologic and nutrient budgets.

    Throughfall over any period depends on the balance between precipitation, evaporation and canopy storage (Horton, 1919; Leonard, 1967; Rutter et al., 1972). If the watershed is divided into different vegetation types based on similarity in throughfall and steamflow, the total throughfall over the watershed can be expressed as:

    (1) Pg = Sum( T n A n )+ Sum (Sm Dm)

    Where Pg = total throughfall reaching the ground, Tn = canopy throughfall from vegetation type n, An = area of vegetation type n, Sm = stemflow from stem type m and Dm = number of stems in type m.

    Using eqn. (1) to estimate total watershed throughfall becomes a problem of determining the minimum number of vegetation types necessary to describe the system at the required level of accuracy. In one of our studies, measured throughfall was compared with actual canopy and stem conditions to estimate the percentages of throughfall for different time periods was calculated by weighting the average throughfall and stemflow measured in representative areas of each vegetation type by the total area of that vegetation group.

    Measurements reported here were made in two of the Bisley Research Watershed of the U.S. Forest Service. These adjacent watersheds drain 13.0 ha of highly dissected mountainous terrain that range in elevation from 265 to 455 m. Both watersheds are covered by Tabonuco type forests and were selectively logged at various times between 1860 and 1940 (Scatena, 1988).
    The dominant tree in the watersheds in the Tabonuco ( Dacryodes excelsa ) which often comprises as much as 35% of the canopy ( Wadsworth, 1970). Structurally the forest has three dominant layers, a discontinuous emergent strata, a continuous upper stratum at 20 m, and an understory layer. Leaves are mesophyllous and often covered with epiphytic growth.
  • Keywords

    Hydrology, Water Chemistry

    XML Metadata

    XML is in ISO-19115 geographic metadata format, compatible with ESRI Geoportal Server.

  • Citation for This Dataset

    Scatena, F.N., IITF, Heartsil-Scalley, IITF. Bisley weekly throughfall flux. 2013.

    Citation for This Webpage

    Scatena, F.N.; IITF; Heartsil-Scalley (2002). "CZO Dataset: Bisley - Overland Water Chemistry, Nutrient Fluxes, Rainfall Chemistry, Throughfall Chemistry (1988-2002) - Includes Weekly Rainfall flux." Retrieved 21 Jan 2020, from


Bisley - Nutrient fluxes for rainfall and throughfall 1988-2002

(.csv)   Data Level 1,  Metadata

Bisley - Nutrient fluxes for rainfall and throughfall 1988-2002

(.csv)   Data Level 1,  Metadata

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