The State of Oregon Department of Environmental Quality (DEQ) is developing a TMDL for temperature in the Willamette River basin shown in Figure 1. The study area included the Willamette River and all major...

Water related ecosystem services (WES), such as flow regulation, drinking water supply, temperature regulation, and water recreational activities, are affected by anthropogenic climate change. Forecasting...

The Tualatin Valley is a well defined elliptical basin centered at Hillsboro, with a major axis trending roughly N65°W. The valley is bordered on the northeast by the Tualatin Mountains (Portland Hills) which...

This report presents the results of a demographic study conducted by the Portland State University Population Research Center (PRC) for the Tigard‐Tualatin School District (TTSD). The study includes analysis...

This report presents the results of a demographic study conducted by the Portland State University Population Research Center (PRC) for the Tigard‐Tualatin School District (TTSD). The study includes analysis...

A reconnaissance of pharmaceutical chemicals in urban streams of the Tualatin River basin was conducted in July 2002 in an effort to better understand the occurrence and distribution of such compounds, and to...

For countless years, the interaction between climatic conditions and water flow has forged the rolling hills and rivers in the metroscape. The floods that forced a deluge of water down the Columbia River...

While many factors are unique to communities on both sides of the Columbia River, our local and regional landscapes unite us and provide a shared sense of place. Bald eagles from the headwaters of the Tualatin...

This edition of The Landscape takes a brief look at the city of Tualatin, Oregon, located twelve miles south of Portland, and examines its population, growth, and demographics, as well as defining features and...

This study compared two remote sensing water indices: the Normalized Difference Water Index (NDWI) and the Modified NDWI (MNDWI). Both indices were calculated using publically-available data from the Landsat 8...