Read-Me File for Estimator2000....Tim Cohn (cohns@erols.com) This directory contains the "Estimator" application, which implements the Minimum Variance Unbiased Estimator and Adjusted Maximum Likelihood Estimator developed by Cohn and others for estimating the transport of nutrients and other compounds carried in streams. The statistical methods are documented in: 1) COHN, T., D. L. CAULDER, E. J. GILROY, L. D. ZYNJUK, AND R. M. SUMMERS, "THE VALIDITY OF A SIMPLE STATISTICAL MODEL FOR ESTIMATING FLUVIAL CONSTITUENT LOADS: AN EMPIRICAL STUDY INVOLVING NUTRIENT LOADS ENTERING CHESAPEAKE BAY, "WATER RESOURCES RESEARCH , 28(9), PP. 2353-2364, 1992. 2) COHN, T., L. L. DELONG, E. J. GILROY, R. M.. HIRSCH, AND D. K. WELLS, "ESTIMATING CONSTITUENT LOADS," WATER RESOURCES RESEARCH , 25(5), PP. 937-942, 1989. 3) COHN, T., E. J. GILROY AND W. G. BAIER, "ESTIMATING FLUVIAL TRANSPORT OF TRACE CONSTITUENTS USING A REGRESSION MODEL WITH DATA SUBJECT TO CENSORING," PP. 142-151, PROCEEDINGS OF THE JOINT STATISTICAL MEETING, BOSTON, AUGUST 9-13, 1992. 4) GILROY, E. J., R. M. HIRSCH, AND T. COHN, "MEAN SQUARE ERROR OF REGRESSION-BASED CONSTITUENT TRANSPORT ESTIMATES," WATER RESOURCES RESEARCH, 26(9), PP. 2069-2077, 1990. 5) COHN, T., "RECENT ADVANCES IN STATISTICAL METHODS FOR THE ESTIMATION OF SEDIMENT AND NUTRIENT TRANSPORT IN RIVERS," CHAPTER 21 IN CONTRIBUTIONS IN HYDROLOGY, US NATIONAL REPORT TO THE IUGG, PP. 1117-1124, 1995. 6) COHN, T. "ADJUSTED MAXIMUM LIKELIHOOD ESTIMATION OF THE MOMENTS OF LOGNORMAL POPULATIONS FROM TYPE I CENSORED SAMPLES," U.S. GEOLOGICAL SURVEY OPEN FILE REPORT NO. 88-350, 34 PP., 1988. 7) HIRSCH, R. M., D. R. HELSEL, T. A. COHN, AND E. J. GILROY, "STATISTICAL TREATMENT OF HYDROLOGICAL DATA," CHAPTER 17 IN THE MCGRAW-HILL HANDBOOK OF HYDROLOGY, D. R. MAIDMENT (ED.), MCGRAW-HILL, NEW YORK, 1872 PP., 1993. 8) GILROY, E. J., W. H. KIRBY, T. COHN AND G. DOUGLAS GLYSSON, "DISCUSSION OF 'UNCERTAINTY IN SUSPENDED SEDIMENT TRANSPORT CURVES' BY MCBEAN AND AL-NASSRI," JOURNAL OF HYDRAULIC ENGINEERING, 116(1), PP. 143-145, JANUARY, 1990. 9) HELSEL, DENNIS R., AND T. COHN, "ESTIMATION OF DESCRIPTIVE STATISTICS FOR MULTIPLY- CENSORED ENVIRONMENTAL DATA," PRESENTED AT ENVIRONMETRICS 87, AMERICAN STATISTICAL ASSOCIATION, WASHINGTON, D.C., NOVEMBER 1987. To obtain the software, download all the files in the directory. Then read the Test01.run file. To run the estimator with the test data, double click the estimator2000 icon and enter "TEST01.RUN" at the first prompt. Good Luck!