Watershed Scale Physically Based Water Flow, Sediment and Nutrient Dynamic Modeling System - Landscape Ecology for Sustainable Environment and Culture - page 162

IP act|sta net slow sorption transfer rate between the active inorganic P pool and

the stable inorganic P pool [M/L 2 /T]

IP act,e surface erosion/deposition rate of soil active inorganic P detachment

[M/L 2 /T]

external sources [M/L 2 /T] IP act,s

concentration of soil layer stable inorganic P [M/L 3 ] minP sta

IP sta,e surface erosion/deposition rate of soil stable inorganic P detachment

[M/L 2 /T]

external sources [M/L 2 /T]

IP sta,s

concentration of POP in the overland flow [M/L 3 ] POP ov

total concentration of organic P in the upper soil layer [M/L 3 ] orgP

k hp POP hydrolysis rate constant [1/T]

concentration of DOP in the overland flow [M/L 3 ] DOP ov

k mp DOP mineralization rate constant [1/T]

concentration of DIP in the overland flow [M/L 3 ] DIP ov

k ep DIP mass transfer rate between the upper soil layer and overland flow

[L/T]

plant uptake rate of the overland flow DIP [M/L 3 /T] R DIP,up

concentration of in-stream PON [M/L 3 ] PON ch

temperature-dependent phytoplankton death rate [T -1 ]

k dp

temperature-dependent bottom algae death rate [T -1 ]

k db

stream phytoplankton concentration [M/L 3 ]

A p

stream bottom algae concentration [M/L 2 ] A b

temperature-dependent PON hydrolysis rate coefficient [T -1 ] k hn

concentration of in-stream DON [M/L 3 ]

DON ch

temperature-dependent DON mineralization rate coefficient [T -1 ]

k mn

F oxmn DON mineralization attenuation due to low oxygen

TNH 4 ch Total concentration of in-stream NH 4 [M/L 3 ]

temperature-dependent phytoplankton respiration rate [T -1 ]

k rp

F oxna nitrification attenuation due to low oxygen

temperature-dependent NH 4 nitrification rate coefficient [T -1 ] k nit

preference coefficient of phytoplankton for NH 4 P ap

preference coefficient of bottom algae for NH 4

P ab

NO 3 ch concentration of in-stream NO 3 [M/L 3 ]

DOC half-saturation constant for denitrification [gC/m 3 ] [M/L 3 ] K scdn

temperature-dependent NO 3 denitrification rate coefficient [T -1 ] k dnit

F oxdn effect of low oxygen on denitrification

concentration of in-stream POP [M/L 3 ]

POP ch

concentration of in-stream DOP [M/L 3 ] DOP ch

total concentration of in-stream inorganic P [M/L 3 ] TIP ch

temperature-dependent POP hydrolysis rate coefficient [T -1 ] k hp

temperature-dependent DOP mineralization rate coefficient [T -1 ] k mp

F oxmp DOP mineralization attenuation due to low oxygen

concentration of in-stream POC [M/L 3 ] POC ch