摘要:

ABSTRACTThe Piper (1953) trilinear diagram has been widely used to graphically represent the dissolved constituents of natural waters and to test for apparent mixtures of waters from different sources. Because of the time required to plot points and calculate the proportional values of mixing, this treatment of data was often quite tedious, particularly in studies involving large numbers of chemical analyses. The PIPER program was written in BASIC to be run on a Hewlett‐Packard desktop computer with an X‐Y plotter. Data input is in ppm units. The program plots points in all three fields of the trilinear diagram, draws at each point within the central diamond field a circle with a radius correspondent to the concentrations expressed in meq/1, checks for points that fall on a straight line (or within a predetermined tolerance of a straight line) representing postulated mixtures with two end members, and/or within a triangle representing mixtures of three end members. Finally, the program does a numerical analysis of the mixing ratios of the constituents for postulated mixing systems according to the methodology as presented by Piper (19

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00706.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract.With an Apple II microcomputer it is possible to rapidly generate and graphically compare theoretical time‐drawdown curves with field data from pumping tests in confined aquifers. This technique has the advantage over standard curve‐matching methods in that any solution can be tested over the complete range of field d

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00707.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

AbstractAQMODL is an analytical mathematical aquifer modeling program for the HP‐41C handheld programmable calculator. It does not require any written instructions for its use. It guides the operator through its use and prevents operator error. It is designed so that it can be used by anyone only basically familiar with the operation of the HP‐41C calculator, and with aquifer modeling.There are no special key assignments, and no special data preparation or storage operations or any other prior preparation necessary before running AQMODL, simply XEQ AQMODL and follow the calculator’guidance.AQMODL can be used to model simple or complex single aquifer situations. It considers any regional change (rising or falling) in water level not necessarily associated with the development being modeled. It also models the aquifer's water‐level gradient.Sixty pumping and/or recharge wells can be entered into the model, and the resultant change in water level and water‐level elevation determined at an unlimited number of observation points in th

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00708.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY