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addCoupledFlow.ca
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addCoupledFlow.ca
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/*
Copyright (c) 2013 Centre for Water Systems,
University of Exeter
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
// Add the volume of water from an inflow event or from coupling flows to the water depth.
CA_FUNCTION addCoupledFlow(CA_GRID grid, CA_CELLBUFF_REAL_IO WD, CA_CELLBUFF_STATE_I MASK,
CA_GLOB_REAL_I volume, CA_GLOB_REAL_I avgDepth)
{
// Initialise the grid
CA_GRID_INIT(grid);
// Nothing to do if the volume is 0
if (volume == 0.0)
return;
// Retrive the water depth
CA_REAL wd = caReadCellBuffReal(grid, WD, 0);
// Retrive the area of the main cell.
CA_REAL area = caArea(grid, 0);
// Read Mask.
CA_STATE mask = caReadCellBuffState(grid, MASK, 0);
// Read bit 0 (false the main cell has nodata)
CA_STATE bit0 = caReadBitsState(mask, 0, 1);
// If the main cell has no data. Do
// nothing.
if(bit0 == 0)
return;
// Compute the amount of water to add or remove.
CA_REAL newLevel;
if (volume >= 0 || caAbsReal(avgDepth) < 1e-5) {
newLevel = caMaxReal(0, wd + volume / area);
}
else {
CA_REAL diff = (wd / avgDepth) * volume / area;
newLevel = caMaxReal(0, wd + diff);
}
// Update the water depth.
caWriteCellBuffReal(grid, WD, newLevel);
}