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GW004_MODFLOW_input_2D_forpht3d.m
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GW004_MODFLOW_input_2D_forpht3d.m
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% MODFLOW_input_print_test_quickstart.m
%
% v3 (10/28/15): notes added to share script
% ############################################################
% Search for: "CUSTOMIZE TO YOUR COMPUTER!!"
% ############################################################
% Prints ASCII files for MODFLOW ba6, dis, and top of lpf input files.
% ===================
% Assumes following:
% ===================
% For ba6 file:
% - 1D vertical profile domain
% - Top boundary cond constant head
% - Bottom boundary cond constant head
% - Initial head: solve for hyd gradient consistent with Q, K, and h_Bot
% - constant DZ, DELR, DELC discretization;
% For dis file:
% - NPER = 1; ITMUNI = 4 (day); LENUNI = 2 (m)
% - LAYCBD = 0 for all layers (i.e. no quasi-3D confining bed under layer)
% Hard-coded file names in .nam file:
% - test.lst (MODFLOW output file, summary output)
% - test.pcg (MODFLOW input file for solver)
% - test.oc (MODFLOW input file for output specifications)
% - test.bud (MODFLOW output file)
% - testhead.dat (MODFLOW output file)
% - ibound.dat (MODFLOW output file)
%%% - testrech.bud (MODFLOW output file)
% (Note: For arrays, must have values for all columns on same line! This is not req'd for PHT3D arrays....)
clear all, close all; fclose all;
% **************** CUSTOMIZE TO YOUR COMPUTER!! ***************************
% -- MOD_dir: Directory where you keep your MODFLOW test directories
% (you can ignore "isunix" part, that's for my computers)
fl_gcng = 0; % 1 for gcng
if fl_gcng
MOD_dir = '/home/gcng/workspace/ModelRuns_scratch/MODFLOW_projects/Minntac/test3';
% -- MOD_exe: MODFLOW executable
% (not actually used, but script will print command for you for your
% convenience)
MOD_exe = '/home/gcng/workspace/Models/MODFLOW/Unix/exe/mf2005';
% *** NEW
% only use ONE of these lines for slashstr (comment out the other)
slashstr = '/'; % use this if on Linux
% slashstr = '\'; % use this if on Windows
else % Patrick
MOD_dir = 'C:/Hydro_Modeling/MINNTAC_MATLAB_FILES';
% -- MOD_exe: MODFLOW executable
% (not actually used, but script will print command for you for your
% convenience)
MOD_exe = 'C:/Hydro_Modeling/mf2005.1_11/bin/mf2005.exe';
% *** NEW
% only use ONE of these lines for slashstr (comment out the other)
slashstr = '/'; % use this if on Linux
% slashstr = '\'; % use this if on Windows
end
% ************* (end to CUSTOMIZE TO YOUR COMPUTER!!) *********************
% - Domain parameters (for ba6, dis)
nlay = 75;
ncol = 150; %
y_scale = 200/nlay; %ratio set by initial harcoded discretization of 200 rows by 400 columns
x_scale = 400/ncol; %ratio set by initial harcoded discretization of 200 rows by 400 columns
domain_len = 213.4; % meters
domain_bot_elev = -23.7; % meters
domain_top_elev = 0; % top of domain must be at least this elev (include extra space for WT mov't)
% - head boundary conditions
TopHead = [0:(-3.63)/(ncol-1):-3.63]; % head at top boundary (elev nominal at stream bottom)
% - K array (assume isotropic, but can be heterogeneous)
hydcond = ones(nlay,ncol) * 2.40; % Avg from MW12 S/I/D m/d
hydcond(1:round(62/y_scale),1:round(150/x_scale)) = 0.672; % taken from k_values_Erik_Smith.jpg in google drive
hydcond(1:round(88/y_scale),round(150/x_scale):round(225/x_scale)) = 0.033; % taken from k_values_Erik_Smith.jpg in google drive
hydcond(1:round(62/y_scale),round(226/x_scale):round(375/x_scale)) = 0.672; % taken from k_values_Erik_Smith.jpg in google drive
fl_recharge = 1; %1: use recharge
hiRate = 0.00084; % m/d determined by Travis' Hydrus model Core 3Dup cummulative bottom flux
loRate = 0.00056;
% -- name of directory with MODFLOW test (create input files in this
% directory)
% *** WARNING! IT WILL OVERWRITE EXISTING FILES!!! ***
MODtest_dir = 'GW004_MODFLOW_dir';
% -- names of input files (created with this script)
fil_ba6 = 'test_1D.ba6';
fil_dis = 'test_1D.dis';
fil_lpf = 'test_1D.lpf';
fil_nam = 'test.nam';
fil_lmt = 'test.lmt';
% the following are not changed
fil_pcg = 'test.pcg';
fil_oc = 'test.oc';
% the following is created only if recharge stress package is used
if fl_recharge
fil_rch = 'test.rch';
end
% - time info
nper = 1; % number of stress periods
nstp = ones(nper,1); % number of time steps in a stress period
perlen = ones(nper,1)*10; % length of time in a stress period
SsTr_flag = repmat('SS',nper,1); % 'SS' for steady-state, 'Tr' for transient
if strcmp(SsTr_flag(1,:), 'Tr') % transient
Ss = 3e-1; % specific storage [1/m] (confined layers, those below uconfined layers)
% Sy = 0.2; % specific yield (unconfined layer)
Sy = Ss * 0.01; % specific yield (unconfined layer)
nstp(:) = 10;
end
%% =======================================================================
% MODtest_dir0 = fullfile(MOD_dir, MODtest_dir);
MODtest_dir0 = [MOD_dir, slashstr, MODtest_dir];
if ~exist(MODtest_dir0, 'dir')
mkdir(MOD_dir, MODtest_dir);
end
% LPF parameters
flow_filunit = 34; % 0: no cell-by-cell flow terms written,
% >0: cell-by-cell flow terms written to this unit number when "SAVE BUDGET",
% <0: cell-by-cell flow for constant-head cells in listing file when "SAVE BUDGET"
% - discretization
DELR = domain_len / ncol; DELC = DELR;
dz = (domain_top_elev - domain_bot_elev)/nlay;
IBOUND = ones(nlay, ncol); % 1: variable head
IBOUND(1:(78/y_scale),1) = -1 %Constant Head at Cell 1
IBOUND((37/y_scale):(200/y_scale),(400/x_scale)) = -1 %Constant Head at GW004
IBOUND((200/y_scale),1:(400/x_scale)) = 0; %No flow base
IBOUND(1,1:(400/x_scale)) = 1
IBOUND(round(197/y_scale),round(300/x_scale):round(400/x_scale)) = 0; %no flow boundary
IBOUND(round(198/y_scale),round(200/x_scale):round(400/x_scale)) = 0; %no flow boundary
IBOUND(round(199/y_scale),round(100/x_scale):round(400/x_scale)) = 0; %no flow boundary
%IBOUND(nearest(156/y_scale):nearest(200/y_scale),1:nearest(327/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(158/y_scale):nearest(200/y_scale),nearest(328/x_scale):nearest(340/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(160/y_scale):nearest(200/y_scale),nearest(341/x_scale):nearest(350/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(164/y_scale):nearest(200/y_scale),nearest(351/x_scale):nearest(356/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(168/y_scale):nearest(200/y_scale),nearest(357/x_scale):nearest(360/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(172/y_scale):nearest(200/y_scale),nearest(361/x_scale):nearest(364/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(176/y_scale):nearest(200/y_scale),nearest(365/x_scale):nearest(368/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(180/y_scale):nearest(200/y_scale),nearest(369/x_scale):nearest(372/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(184/y_scale):nearest(200/y_scale),nearest(373/x_scale):nearest(376/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(188/y_scale):nearest(200/y_scale),nearest(377/x_scale):nearest(380/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(192/y_scale):nearest(200/y_scale),nearest(381/x_scale):nearest(384/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(194/y_scale):nearest(200/y_scale),nearest(385/x_scale):nearest(388/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(196/y_scale):nearest(200/y_scale),nearest(389/x_scale):nearest(392/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(nearest(198/y_scale):nearest(200/y_scale),nearest(393/x_scale):nearest(396/x_scale)) = 0; % 0: no flow at bottom
%IBOUND(1:nearest(72/y_scale),1) = -1; % constant head at cell 1
%IBOUND(nearest(73/y_scale):nearest(155/y_scale),1) = 1; % variable head below cell 1, break at 13/14 due to assumed depth of
% tailing pond to be 10 meters... 10 meters approx =
% 13 grid cells. Assumption pond is losing water body.
%IBOUND(nearest(111/y_scale):end,end) = -1; % constant head at MW12
%IBOUND(1,2:nearest(216/x_scale)) = 1; % 1: variable head at top
%IBOUND(1:ceil(4/y_scale),nearest(217/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:ceil(8/y_scale),nearest(219/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:ceil(12/y_scale),nearest(220/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(16/y_scale),nearest(222/x_scale):nearest(233/x_scale)) = 0; % in the air
%IBOUND(1:nearest(20/y_scale),nearest(225/x_scale):nearest(232/x_scale)) = 0; % in the air
%IBOUND(1:nearest(14/y_scale),nearest(233/x_scale):nearest(237/x_scale)) = 0; % in the air
%IBOUND(1:nearest(28/y_scale),nearest(238/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(34/y_scale),nearest(239/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(37/y_scale),nearest(240/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(44/y_scale),nearest(242/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(47/y_scale),nearest(244/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(53/y_scale),nearest(246/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(55/y_scale),nearest(248/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(57/y_scale),nearest(253/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(59/y_scale),nearest(255/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(61/y_scale),nearest(265/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(63/y_scale),nearest(267/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(65/y_scale),nearest(294/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(67/y_scale),nearest(318/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(69/y_scale),nearest(328/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(71/y_scale),nearest(329/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(73/y_scale),nearest(331/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(75/y_scale),nearest(337/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(77/y_scale),nearest(344/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(79/y_scale),nearest(346/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(81/y_scale),nearest(349/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(83/y_scale),nearest(353/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(85/y_scale),nearest(357/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(88/y_scale),nearest(363/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(90/y_scale),nearest(369/x_scale):nearest(400/x_scale)) = 0; % in the air
%IBOUND(1:nearest(92/y_scale),nearest(382/x_scale):nearest(400/x_scale)) = 0; % in the air
initHead = repmat(TopHead, nlay, 1);
% if fl_recharge == 1 && ~isempty(find(IBOUND(1,:) < 0,1))
% fprintf('Error! Top layer must be variable head (IBOUND > 0) to receive recharge! Exiting...\n');
% return
% end
% get layer elevations
botm = [domain_bot_elev: dz: domain_top_elev]';
botm = botm(end-1: -1: 1);
top_sys = domain_top_elev; % if head > top, this is confined condition
% -- pcg and oc files are not changed with this script
% fil_pcg_0 = fullfile(MODtest_dir0, fil_pcg);
fil_pcg_0 = [MODtest_dir0, slashstr, fil_pcg];
fid = fopen(fil_pcg_0, 'wt');
fprintf(fid, '# Preconditioned conjugate-gradient package\n');
fprintf(fid, ' 50 30 1 MXITER, ITER1, NPCOND\n');
fprintf(fid, ' 0000.001 .001 1. 2 1 1 1.00\n');
fprintf(fid, ' HCLOSE, RCLOSE, RELAX, NBPOL, IPRPCG, MUTPCG damp\n');
fclose(fid);
% fil_oc_0 = (MODtest_dir0, fil_oc);
fil_oc_0 = [MODtest_dir0, slashstr, fil_oc];
fid = fopen(fil_oc_0, 'wt');
fprintf(fid, 'HEAD PRINT FORMAT 20\n');
fprintf(fid, 'HEAD SAVE UNIT 51\n');
fprintf(fid, 'COMPACT BUDGET AUX\n');
fprintf(fid, 'IBOUND SAVE UNIT 52\n');
for per_i = 1:nper
for stp_i = 1:nstp(per_i)
fprintf(fid, 'PERIOD %d STEP %d\n', per_i, stp_i);
if stp_i == nstp
fprintf(fid, ' PRINT HEAD\n');
fprintf(fid, ' SAVE IBOUND\n');
fprintf(fid, ' PRINT BUDGET\n');
end
fprintf(fid, ' SAVE HEAD\n');
fprintf(fid, ' SAVE BUDGET\n');
end
end
fclose(fid);
% -- ba6 file
% fil_ba6_0 = fullfile(MODtest_dir0, fil_ba6);
fil_ba6_0 = [MODtest_dir0, slashstr, fil_ba6];
fmt1 = [repmat('%4d', 1, ncol), '\n']; % for IBOUND (for x-section, ow need nrow x ncol for each layer)
fmt2 = [repmat('%7g ', 1, ncol), '\n']; % for initHead
fid = fopen(fil_ba6_0, 'wt');
fprintf(fid, '# basic package file --- x-section %d layers, %d column\n', nlay, ncol);
fprintf(fid, 'XSECTION\n');
fprintf(fid, 'INTERNAL 1 (FREE) 3\n');
fprintf(fid, fmt1, IBOUND');
fprintf(fid, ' 999.99 HNOFLO\n');
fprintf(fid, 'INTERNAL 1.0 (FREE) 3\n');
fprintf(fid, fmt2, initHead');
fclose(fid);
% -- dis file
% for now, assume these inputs:
nrow = 1; % 1 for x-section
itmuni = 4; % time units, 4: day
lenuni = 2; % length units, 2: m
LAYCBD = zeros(1,nlay); % 0: no quasi-3D confining bed under layer
tsmult = 1; % multiplier for length of successive time steps
% fil_dis_0 = fullfile(MODtest_dir0, fil_dis);
fil_dis_0 = [MODtest_dir0, slashstr, fil_dis];
fmt3 = [repmat(' %d', 1, nlay), '\n']; % for LAYCBD
fid = fopen(fil_dis_0, 'wt');
fprintf(fid, ' %d %d %d %d %d %d ', nlay, nrow, ncol, nper, itmuni, lenuni);
fprintf(fid, ' NLAY,NROW,NCOL,NPER,ITMUNI,LENUNI\n');
fprintf(fid, fmt3, LAYCBD);
fprintf(fid, 'CONSTANT %14g DELR\n', DELR);
fprintf(fid, 'CONSTANT %14g DELC\n', DELC);
fprintf(fid, 'CONSTANT %14g TOP of system\n', top_sys);
for ii = 1: nlay
fprintf(fid, 'CONSTANT %14g Layer BOTM layer %4d\n', botm(ii), ii);
end
for ii = 1: nper
fprintf(fid, ' %g %d %g %c%c PERLEN, NSTP, TSMULT, Ss/Tr (stress period %4d)\n', ...
perlen(ii), nstp(ii), tsmult, SsTr_flag(ii,:), ii);
end
fclose(fid);
% -- top of lpf file (use Ksat_realization or other to create Ksat inputs)
% assumed input values
hdry = 1e30; % head assigned to dry cells
nplpf = 0; % number of LPF parameters (if >0, key words would follow)
laytyp = ones(nlay,1); % laytyp(1) = 1; % top is "covertible", rest are "confined"
layave = zeros(nlay,1); % harmonic mean for interblock transmissivity
chani = ones(nlay,1); % constant horiz anisotropy mult factor (for each layer)
layvka = zeros(nlay,1); % flag 0: vka is vert K; >0 is vertK/horK ratio
laywet = zeros(nlay,1); % flag 0: wetting off
fmt1 = repmat('%2d', 1, nlay);
% fil_lpf_0 = fullfile(MODtest_dir0, fil_lpf);
fil_lpf_0 = [MODtest_dir0, slashstr, fil_lpf];
fid = fopen(fil_lpf_0, 'wt');
fprintf(fid, '# LPF package inputs\n');
fprintf(fid, '%d %g %d ILPFCB,HDRY,NPLPF\n', flow_filunit, hdry, nplpf);
fprintf(fid, [fmt1, ' LAYTYP\n'], laytyp);
fprintf(fid, [fmt1, ' LAYAVE\n'], layave);
fprintf(fid, [fmt1, ' CHANI \n'], chani);
fprintf(fid, [fmt1, ' LAYVKA\n'], layvka);
fprintf(fid, [fmt1, ' LAYWET\n'], laywet);
% -- Write HKSAT and Ss, Sy (if Tr) in .lpf file
format0 = [repmat(' %4.2f', 1, ncol), '\n'];
format1 = [repmat(' %4.2e', 1, ncol), '\n'];
% loop thru layers (different entry for each layer)
for lay = 1: nlay
fprintf(fid, 'INTERNAL 1.000E-00 (FREE) 0 HY layer %d\n', lay);
fprintf(fid, format0, hydcond(lay,:));
fprintf(fid, 'INTERNAL 1.000E-00 (FREE) 0 VKA layer %d\n', lay);
fprintf(fid, format0, hydcond(lay,:));
if strcmp(SsTr_flag, 'Tr')
if laytyp(lay) == 0 % confined
fprintf(fid, 'INTERNAL 1.000E-00 (FREE) 0 Ss layer %d\n', lay);
fprintf(fid, format1, ones(ncol,1)*Ss);
elseif laytyp(lay) == 1 % convertible, i.e. unconfined
fprintf(fid, 'INTERNAL 1.000E-00 (FREE) 0 Sy layer %d\n', lay);
fprintf(fid, format1, ones(ncol,1)*Sy);
end
end
end
fprintf(fid, '\n');
fclose(fid);
% -- .rch file
if fl_recharge
NRCHOP = 3; % option 3: apply recharge rate to highest active cell in column
IRCHBD = -1; % <0 to skip writing cell-by-cell flow terms to file
INRECH = 1; % >0: read in recharge values below (<0: use recharge from previous stress period)
% fil_rch_0 = fullfile(MODtest_dir0, fil_rch);
fil_rch_0 = [MODtest_dir0, slashstr, fil_rch];
fid = fopen(fil_rch_0, 'wt');
fprintf(fid, '# recharge package \n');
fprintf(fid, ' %2d %2d NRCHOP,IRCHBD\n', NRCHOP,IRCHBD); %
for per_i = 1: nper
fprintf(fid, ' %2d INRECH\n', INRECH); %
% fprintf(fid, 'CONSTANT %14g RECH (PERIOD %d) \n', rch_rate, per_i);
SpatVarRechRate = ones(ncol,1);
SpatVarRechRate(1:nearest(375/x_scale)) = hiRate;
SpatVarRechRate(nearest(375/x_scale):nearest(400/x_scale)) = loRate;
fprintf(fid, 'INTERNAL 1.0 (FREE) 0 recharge rate \n');
fprintf(fid, format1, SpatVarRechRate);
end
fclose(fid);
end
% -- .nam file with full paths
% fil_nam_0 = fullfile(MODtest_dir0, fil_nam);
fil_nam_0 = [MODtest_dir0, slashstr, fil_nam];
fid = fopen(fil_nam_0, 'wt');
% fprintf(fid, 'LIST 7 %s \n', fullfile(MODtest_dir0, 'test.lst')); % MODFLOW output file
fprintf(fid, 'LIST 7 %s \n', [MODtest_dir0, slashstr, 'test.lst']); % MODFLOW output file
fprintf(fid, 'BAS6 8 %s \n', fil_ba6_0);
fprintf(fid, 'LPF 11 %s \n', fil_lpf_0);
if fl_recharge
% fprintf(fid, 'RCH 18 %s \n', fullfile(MODtest_dir0, fil_rch));
fprintf(fid, 'RCH 18 %s \n', [MODtest_dir0, slashstr, fil_rch]);
end
% fprintf(fid, 'PCG 19 %s \n', fullfile(MODtest_dir0, fil_pcg));
fprintf(fid, 'PCG 19 %s \n', [MODtest_dir0, slashstr, fil_pcg]);
% fprintf(fid, 'OC 22 %s \n', fullfile(MODtest_dir0, fil_oc));
fprintf(fid, 'OC 22 %s \n', [MODtest_dir0, slashstr, fil_oc]);
fprintf(fid, 'DIS 10 %s \n', fil_dis_0);
% fprintf(fid, 'LMT6 66 %s \n', fullfile(MODtest_dir0, fil_lmt));
fprintf(fid, 'LMT6 66 %s \n', [MODtest_dir0, slashstr, fil_lmt]);
fprintf(fid, 'DATA(BINARY) 34 %s \n', fullfile(MODtest_dir0, 'test.bud')); % MODFLOW output file
% if fl_recharge
% fprintf(fid, 'DATA(BINARY) 35 %s \n', fullfile(MODtest_dir0, 'testrech.bud')); % MODFLOW output file
% end
% fprintf(fid, 'DATA(BINARY) 51 %s \n', fullfile(MODtest_dir0, 'testhead.dat')); % MODFLOW output file
fprintf(fid, 'DATA(BINARY) 51 %s \n', [MODtest_dir0, slashstr, 'testhead.dat']); % MODFLOW output file
% fprintf(fid, 'DATA 52 %s \n', fullfile(MODtest_dir0, 'ibound.dat')); % MODFLOW output file
fprintf(fid, 'DATA 52 %s \n', [MODtest_dir0, slashstr, 'ibound.dat']); % MODFLOW output file
fclose(fid);
% -- .lmt file with full paths (this is the binary flow file needed by
% reactive transport model PHT3D)
% fil_lmt_0 = fullfile(MODtest_dir0, fil_lmt);
fil_lmt_0 = [MODtest_dir0, slashstr, fil_lmt];
fid = fopen(fil_lmt_0, 'wt');
fprintf(fid, '# Link-MT3DMS file for MODFLOW-2000, generated by PMWIN \n');
% fprintf(fid, 'OUTPUT_FILE_NAME %s\n', fullfile(MODtest_dir0, 'test.flo')); % MODFLOW output file
fprintf(fid, 'OUTPUT_FILE_NAME %s\n', [MODtest_dir0, slashstr, 'test.flo']); % MODFLOW output file
fprintf(fid, 'OUTPUT_FILE_UNIT 333 \n');
fprintf(fid, 'OUTPUT_FILE_HEADER Standard \n');
fprintf(fid, 'OUTPUT_FILE_FORMAT Unformatted \n');
fclose(fid);
% -- Print instructions to run model:
fprintf('MODFLOW input files created! \n');
fprintf('To run model: \n');
fprintf('(from %s or whichever directory you want output files in)\n', MODtest_dir0);
fprintf('\nprompt> %s\n\n', [MOD_exe, ' ', fil_nam_0]);