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LCZO -- Overland Water Chemistry, Nutrient Fluxes, Rainfall Chemistry, Throughfall Chemistry -- Includes Weekly Rainfall flux -- Bisley -- (1988-2002)
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Abstract
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.
Subject Keywords
Coverage
Spatial
Temporal
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Content
ReadMe.md
LCZO -- Overland Water Chemistry, Nutrient Fluxes, Rainfall Chemistry, Throughfall Chemistry -- Includes Weekly Rainfall flux -- Bisley -- (1988-2002)
OVERVIEW
Description/Abstract
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.
Creator/Author
Scatena, F.N.|IITF|Heartsil-Scalley
CZOs
Luquillo
Contact
Miguel Leon, Miguel.Leon@unh.edu
Subtitle
Nutrient fluxes for rainfall and throughfall in the Bisley watersheds; Bisley Weekly Rainfall flux
SUBJECTS
Disciplines
Water Chemistry
Topics
Overland Water Chemistry|Nutrient Fluxes|Rainfall Chemistry|Throughfall Chemistry
Subtopic
Includes Weekly Rainfall flux
Keywords
Hydrology|Water Chemistry
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:
Variables ODM2
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
TEMPORAL
Date Start
1988-03-08
Date End
2002-12-31
SPATIAL
Field Areas
Bisley
Location
Bisley
North latitude
18.314405999999998
South latitude
18.314405999999998
West longitude
-65.74491
East longitude
-65.74491
REFERENCE
Citation
Scatena, F.N., IITF, Heartsil-Scalley, IITF. Bisley weekly throughfall flux. 2013.
CZO ID
2626
Additional Metadata
Name | Value |
---|---|
czos | Luquillo |
czo_id | 2626 |
citation | Scatena, F.N., IITF, Heartsil-Scalley, IITF. Bisley weekly throughfall flux. 2013. |
keywords | Hydrology, Water Chemistry |
subtitle | 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. |
disciplines | Water Chemistry |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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