val.spear.create: Creates a Value Function for River Spear Index

In ecoval: Procedures for Ecological Assessment of Surface Waters

Creates a Value Function for River Spear Index

Description

Creates a value function for the SPEARpesticides index in rivers.

Usage

val.spear.create(language     = "English",
                 dictionaries = NA,
                 col          = "black")

Arguments

language	Language to be used to denote nodes, attributes and attribute levels. Must be a column name of the table provided by the second argument.
dictionaries	Matrix of dictionaries with the languages provided by the column names and the original words provided as the row names. If dictionary is NA, the default dictionary ecoval.dictionaries.default is loaded.
col	Color of bounding boxes in objectives hierarchy.

Value

The function returns the value function as a class utility.

References

Langhans, S.D., Lienert, J., Schuwirth, N. and Reichert, P. How to make river assessments comparable: A demonstration for hydromorphology, Ecological Indicators 32, 264-275, 2013. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.ecolind.2013.03.027")}

Langhans, S.D., Reichert, P. and Schuwirth, N. The method matters: indicator aggregation in ecological river assessment. Ecological Indicators 45, 494-507, 2014. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.ecolind.2014.05.014")}

Reichert, P., Schuwirth, N. and Langhans, S. Constructing, evaluating and visualizing value and utility functions for decision support, Environmental Modelling & Software 46, 283-291, 2013. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.envsoft.2013.01.017")}

Reichert, P., Langhans, S., Lienert, J. and Schuwirth, N. The conceptual foundation of environmental decision support. Journal of Environmental Management. 154, 316-332, 2015. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.jenvman.2015.01.053")}

Reichert, P., Borsuk, M., Hostmann, M., Schweizer, S., Sporri, C., Tockner, K. and Truffer, B. Concepts of decision support for river rehabilitation, Environmental Modelling and Software 22, 188-201, 2007. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.envsoft.2005.07.017")}

https://modul-stufen-konzept.ch

Beketov M.A., Foit K., Schafer R.B., Schriever C.A., Sacchi A., Capri E., Biggs J., Wells C. & Liess M. SPEAR indicates pesticide effects in streams - Comparative use of species- and family-level biomonitoring data. Environmental Pollution, 157, 1841-1848, 2009. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.envpol.2009.01.021")}

See Also

utility.

Examples

spear <- val.spear.create()
plot(spear)
spear.german <- val.spear.create("Deutsch")
plot(spear.german)

ecoval documentation built on Nov. 26, 2025, 5:07 p.m.