نتایج جستجو برای: physiographic units

تعداد نتایج: 172603  

2012
Karen R. Burow Bryant C. Jurgens Kenneth Belitz Neil M. Dubrovsky

A regional assessment of multi-decadal changes in nitrate concentrations was done using historical data and a spatially stratified non-biased approach. Data were stratified into physiographic subregions on the basis of geomorphology and soils data to represent zones of historical recharge and discharge patterns in the basin. Data were also stratified by depth to represent a shallow zone general...

2015
Katrin Bieger Hendrik Rathjens Peter M. Allen Jeffrey G. Arnold

Bankfull hydraulic geometry relationships are used to estimate channel dimensions for streamflow simulation models, which require channel geometry data as input parameters. Often, one nationwide curve is used across the entire United States (U.S.) (e.g., in Soil and Water Assessment Tool), even though studies have shown that the use of regional curves can improve the reliability of predictions ...

Journal: :Nagoya Mathematical Journal 1995

Journal: :Human & Experimental Toxicology 1991

Journal: :JAPANES JOURNAL OF MEDICAL INSTRUMENTATION 1975

Journal: :Acta Radiologica: Therapy, Physics, Biology 1974

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