Table 6.

Suggested probability distributions and arithmetic means for parameters used to calculate the interception fraction (f_v,wet, unitless) for wet deposition.

Parameter	Applicable situation	Distribution type	Distribution parameters	Arithmetic meana
k, dependent on element (unitless)b	anions (I)	triangular	minimum 0; mode 0.5; maximum 1	0.5
	monovalent cations (Cs)	triangular	minimum 0.5; mode 1; maximum 1.5	1
	polyvalent cations (Sr, Ba)	triangular	minimum 1.5; mode 2; maximum 2.5	2
	other elements (Y, Zr, Nb, Mo, Tc, Ru, Rh, Te, La, Ce, Pr, Np, Pu)	uniform	minimum 0; maximum 2.5	1.25
S, water storage capacity (mm)c	grasses, cereals, maize	log-uniform	minimum 0.1; maximum 6	1.44
	other crops, herbaceous plants (broad-leaved species), shrubs	log-uniform	minimum 0.1; maximum 10	2.15
	trees	log-uniform	minimum 0.05; maximum 10	1.88
c (unitless)d	all plant types	log-triangulare	minimum 0.5; mode 3; maximum 5	2.19

^aThe arithmetic mean of the indicated distribution; this value can be used as a point estimate in deterministic assessments.

^bBased on Pröhl (2009) and Müller and Pröhl (1993). See also Bengtsson et al. (2014).

^cBased on Pröhl (2009), IAEA (2009), and a review of the literature. Information was reported by or estimated from Clark (1940); Grah and Wilson (1944); Hamilton and Rowe (1949); Stoltenberg and Wilson (1950); Slatyer (1965); Corbett and Crouse (1968); Rutter et al. (1971/1972, 1975); West and Gifford (1976); Rutter and Morton (1977); Gash and Morton (1978); Gash (1979); Massmann (1983); Thompson (1986); Thurow et al. (1987); Scatena (1990); Návar and Bryan (1994); Domingo et al. (1998); Klaassen et al. (1998); Llorens and Gallart (2000); Liu (2001); Breuer et al. (2003); Kang et al. (2005); Toba and Ohta (2005); Keim et al. (2006); Pryet et al. (2012); Zhang et al. (2016). The water storage capacity was variously reported as water storage capacity, interception storage capacity, residual interception storage, residual storage, canopy interception, interception, water storage, adherent storage capacity, canopy storage capacity, surface storage capacity, canopy saturation, quantity of water on canopy when all surfaces are wet, wetting coefficient, or total interception loss.

^dBased on Müller and Pröhl (1993); Kinnersley and Scott (2001); Pröhl (2009).

^eParameter values are for the log-triangular distribution as plotted in logarithmic space.