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Computer Program Estimate Trend (ESTREND), a System for the Detection of Trendsin Water-Quality Data

机译：计算机程序估计趋势（EsTREND），一种用于检测水质数据趋势的系统

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The purpose of the report is to document a software system for the analysis oftime trends in water-quality data. The system, EStimate TREND (ESTREND), was initially developed to assist in the national andS inveslevel USGS investigations of trends in stream water quality. Certain statistical and operational issues such as (1) the choice of a statistical test for trend, (2) methods of adjusting for flow and seasonal variations, (3) the choice of a minimum number of observations for trend testing, and (4) the selection of water-quality stations are discussed in the report. Decisions related to these issues are based on methods investigations cited in the background section and experience from national and state-level trend investigations.

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作者
Schertz, T. L.; Alexander, R. B.; Ohe, D. J.;
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年度 1991
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总页数 71
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Water quality data; Computerized simulation; Trends; Statistical analysis; Studyestimates; Data base management; Streams; Water flow; Seasonal variations; State government;

机译：水质数据;计算机模拟;趋势;统计分析;研究估算;数据库管理;溪流;水流量;季节变化;州政府;

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1. Introduction to the U.S. Geological Survey National Water-Quality Assessment (NAWQA) of ground-water quality trends and comparison to other national programs. (Papers from the USGS National Water Quality Assessment Groundwater Trends Program.) [J] . Rosen M. R., Lapham W. W. Journal of Environmental Quality . 2008,第Suppla1期

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Computer Program Estimate Trend (ESTREND), a System for the Detection of Trendsin Water-Quality Data

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