STREAM TEMPERATURE INCREASES AND LAND USE IN A FORESTED OREGON WATERSHED1
作者:
Robert L. Beschta,
R. Lynn Taylor,
期刊:
JAWRA Journal of the American Water Resources Association
(WILEY Available online 1988)
卷期:
Volume 24,
issue 1
页码: 19-25
ISSN:1093-474X
年代: 1988
DOI:10.1111/j.1752-1688.1988.tb00875.x
出版商: Blackwell Publishing Ltd
关键词: stream temperature;forestry management;Oregon
数据来源: WILEY
摘要:
ABSTRACT:The Salmon Creek Watershed drains 325 km2of forested terrain in the Cascade Mountains of western Oregon. Over a 30–year period (from 1955 to 1984) average daily maximum and minimum stream temperatures, calculated from the 10 warmest days of each year, have risen 6°C and 2°C, respectively. In contrast, a small decrease in maximum air temperatures was found over the same period. Regression analysis indicated a highly significant (p<0.01) relationship between a cumulative index of forest harvesting and maximum stream temperatures. Maximum temperatures also tended to increase for several years following major peak flow events. The interaction between harvest activity (logging and road construction), changing forest and riparian management practices and the occurrence of natural hydrologic events (peak flows and associated mass soil movements) tend to obscure specific cause‐and‐effect relationships regarding long‐term changes in maximum stream te
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