title: Influence of land use and climate on the load of suspended solids in catchments of Andean rivers.
abstract: Understanding the interaction between anthropogenic land use and the rainfall pattern can be crucial to predict changes in total suspended solids (TSS) in streams and rivers. We assessed the effects of land use and annual rainfall on the TSS load of 19 southern Chilean catchments. The results indicated that the concentration of TSS increased in catchments with a rainy regime and greater annual precipitation. TSS load also increased as the surface of open areas increased at the catchment scale and decreased with increasing cover of glaciers and perennial snow. However, we did not find support for models with interaction terms between climate and land use. Results suggest that a regional decrease in annual rainfall accompanied by an increase in the altitude of the zero isotherms, as predicted by climate models, should have multiple effects on TSS. In particular, increased TSS load can be expected from a contraction of glaciers and perennial snow areas as well as the intensification of new crops and urban expansion.
authors.affiliation: Departamento de Ingeniería Geográfica, Facultad de Ingeniería, Universidad de Santiago de Chile (Usach), Av. Lib. B. O'Higgins no. 3363, Santiago, Chile, jaime.pizarro@usach.cl.
authors.forename: J
authors.initials: J
authors.lastname: Pizarro
authors.forename: P M
authors.initials: PM
authors.lastname: Vergara
authors.forename: J L
authors.initials: JL
authors.lastname: Morales
authors.forename: J A
authors.initials: JA
authors.lastname: Rodríguez
authors.forename: I
authors.initials: I
authors.lastname: Vila
mesh_terms: D002980:Climate; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D008962:Models, Theoretical; D011891:Rain; D045483:Rivers / Q000737:chemistry*; D014872:Water Movements; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D014873:Water Pollutants
references.citation: J Hazard Mater. 2010 Sep 15;181(1-3):747-54
references.pmid: 20541865
references.citation: Sci Total Environ. 2010 Sep 15;408(20):4654-64
references.pmid: 20673966
references.citation: J Hazard Mater. 2010 Nov 15;183(1-3):203-10
references.pmid: 20674162
references.citation: J Water Health. 2007 Dec;5(4):481-502
references.pmid: 17878562
references.citation: Mar Pollut Bull. 2012;65(4-9):101-16
references.pmid: 21889170
references.citation: Environ Manage. 1997 Mar;21(2):203-17
references.pmid: 9008071
references.citation: Ambio. 2006 Mar;35(2):65-74
references.pmid: 16722251
references.citation: J Hazard Mater. 2010 Mar 15;175(1-3):608-13
references.pmid: 19926214