Model:LOADEST

Contact

Name	Rob Runkel
Type of contact	Technical contact
Institute / Organization	U.S. Geological Survey
Postal address 1	Denver Federal Center
Postal address 2
Town / City	Lakewood
Postal code	80225
State	Colorado
Country	USA"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property.
Email address	runkel@usgs.gov
Phone	303/236-4882 ext. 285
Fax	303/236-4912

Edit Model information

LOADEST

Metadata

Summary Also known as Model type Single Model part of larger framework Note on status model Date note status model Technical specs Supported platforms Unix, Linux, Windows Other platform Programming language Fortran77 Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2001 Does model development still take place? No If above answer is no, provide end year model development 2005 Code development status When did you indicate the 'code development status'? Model availability As code, As teaching tool, As executable"As executable" is not in the list (As code, As teaching tool) of allowed values for the "Model availability" property. Source code availability (Or provide future intension) Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property. Source web address Source csdms web address Program license type Other Program license type other U.S. Government software product Memory requirements -- Typical run time -- In/Output Describe input parameters Given a time series of streamflow, additional data variables, and constituent concentration, LOADEST assists the user in developing a regression model for the estimation of constituent load (calibration). Input format ASCII Other input format Describe output parameters Estimated constituent loads Output format ASCII Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software See, http://water.usgs.gov/software/loadest/faq/ Visualization software needed? No If above answer is yes Other visualization software Process Describe processes represented by the model -- Describe key physical parameters and equations -- Describe length scale and resolution constraints -- Describe time scale and resolution constraints -- Describe any numerical limitations and issues -- Testing Describe available calibration data sets -- Upload calibration data sets if available: Describe available test data sets See applications described in software documentation http://water.usgs.gov/software/loadest/doc/ Upload test data sets if available: Describe ideal data for testing -- Other Do you have current or future plans for collaborating with other researchers? -- Is there a manual available? Yes Upload manual if available: Media:Loadest.pdf Model website if any http://water.usgs.gov/software/loadest/ Model forum / discussion board Comments http://water.usgs.gov/software/loadest/ LOADEST Introduction History Papers LOADEST Questionnaire Contact Information Model: LOADEST Contact person: Rob Runkel Institute: U.S. Geological Survey City: -- Country: United Kingdom Email: runkel@usgs.gov 2nd person involved: -- 3rd person involved: -- Model description Model type: Single model for the terrestrial and the coastal domain. Description: LOAD ESTimator (LOADEST) is a FORTRAN program for estimating constituent loads in streams and rivers. Given a time series of streamflow, additional data variables, and constituent concentration, LOADEST assists the user in developing a regression model for the estimation of constituent load (calibration). Explanatory variables within the regression model include various functions of streamflow, decimal time, and additional user-specified data variables. The formulated regression model then is used to estimate loads over a user-specified time interval (estimation). Mean load estimates, standard errors, and 95 percent confidence intervals are developed on a monthly and(or) seasonal basis. The calibration and estimation procedures within LOADEST are based on three statistical estimation methods. The first two methods, Adjusted Maximum Likelihood Estimation (AMLE) and Maximum Likelihood Estimation (MLE), are appropriate when the calibration model errors (residuals) are normally distributed. Of the two, AMLE is the method of choice when the calibration data set (time series of streamflow, additional data variables, and concentration) contains censored data. The third method, Least Absolute Deviation (LAD), is an alternative to maximum likelihood estimation when the residuals are not normally distributed. LOADEST output includes diagnostic tests and warnings to assist the user in determining the appropriate estimation method and in interpreting the estimated loads. The LOADEST software and related materials (data and documentation) are made available by the U.S. Geological Survey (USGS) to be used in the public interest and the advancement of science. You may, without any fee or cost, use, copy, modify, or distribute this software, and any derivative works thereof, and its supporting documentation, subject to the USGS software User's Rights Notice. Technical information Supported platforms: Linux, Unix, Windows Programming language: Fortran77 Model development started at: 2001 and ended in 2005 To what degree will the model become available: Source code will be available, and model can be used as well as a teaching tool and executable will be available. Current license type: U.S. Government software product Memory requirements: -- Typical run time: -- Input / Output description Input parameters: Given a time series of streamflow, additional data variables, and constituent concentration, LOADEST assists the user in developing a regression model for the estimation of constituent load (calibration). Input format: ASCII Output parameters: Estimated constituent loads Output format: ASCII Post-processing software (if needed): no, see see http://water.usgs.gov/software/loadest/faq/ Visualization software (if needed): no Process description Processes represented by model: -- Key physical parameters & equations: -- Length scale & resolution constraints: -- Time scale & resolution constraints: -- Numerical limitations and issues : -- Testing Available calibration data sets: -- Available test data sets: See applications described in software documentation http://water.usgs.gov/software/loadest/doc/ Ideal data for testing: -- User groups Currently or plans for collaborating with: -- Documentation Key papers of the model: http://water.usgs.gov/software/loadest/apps/ Is there a manual available: yes; Loadest.pdf Model website if any: http://water.usgs.gov/software/loadest/ Additional comments Comments: http://water.usgs.gov/software/loadest/ Issues Help Input Files Output Files Download Source