WMS:WMLib
About WMLib
WMLib is a library of ".NET-based" DLL API functions that allows you to call some of the WMS functionality from other .NET-based applications from outside of WMS. You can send the API watershed parameters from either a WMS tree file or code-based hydrologic tree information. After the watershed parameters have been set up, the API can be used to write an HEC-1 input file and to run HEC-1. The API can then read the HEC-1 output hydrographs for each sub-basin and lag the hydrographs based on specified lag times at each outlet point. The HEC-1-computed hydrographs and/or peak flows can be obtained for each outlet and sub-basin in the hydrologic tree.
How WMLib Works
Writing code to run an HEC-1 analysis using WMLib is a simple process. Using any .NET-based programming language, you do the following to run an HEC-1 analysis and read the HEC-1 solution file:
- Either manually build a hydrologic tree, specifying sub-basin and outlet hydrologic and geometric parameters, or read a hydrologic tree from a WMS Tree (*.tre) file.
- Run HEC-1 and read the HEC-1 output hydrographs.
- Write the hydrographs to a file that can be read into the Time Series Editor (*.ts). The Time Series Editor is shipped with WMS and a license to the editor is included with a license of WMS. (optional)
- Lag all the hydrographs in the hydrologic tree. (optional)
- Get peak flows and/or times of peak flows. (optional)
For example, if you want to do all of the above and you have a WMS tree file, you could write the following C# code:
try
{
// Set the job control start time and build the tree from a file
string fileName = "C:\\treeFilePath\\wmsTreeFile.tre";
DateTime currTime = new DateTime(2010, 5, 1, 0, 0, 0);
HydroTree hydroTree = new HydroTree(currTime, 15, 300);
if (FileIo.ReadTreeFile(fileName, hydroTree))
{
fileName = "C:\\hec1OutputPath\\WMLib.hc1";
const string hec1FileName = "C:\\hec1ExePath\\hec1.exe";
// Run HEC-1 and read the HEC-1 output hydrographs
if (hydroTree.RunHec1(fileName, hec1FileName))
{
// Get the peak flow and time before lagging
double peakFlow = hydroTree.GetPeakFlow();
DateTime peakTime = hydroTree.GetPeakTime();
// Write the hydrographs to a file that can be used by the time series editor
hydroTree.WriteTreeToTsFile("C:\\timeSeriesFilePath\\hydrographs.ts");
// Lag all hydrographs in the hydrologic tree
hydroTree.ApplyLagTimes();
// Get the peak flow and time after lagging
peakFlow = hydroTree.GetPeakFlow();
peakTime = hydroTree.GetPeakTime();
}
else
{
MessageBox.Show("Unable to run HEC-1");
}
}
}
catch (Exception ex)
{
MessageBox.Show("An Exception Occurred: " + ex.Message);
}
Alternatively, if you want to build a tree from scratch, you would change the code as follows:
try
{
// Set the job control start time and build the tree from code
List<TimeSeriesPoint> rainfallCurve = new List<TimeSeriesPoint>();
DateTime currTime = new DateTime(2010, 5, 1, 0, 0, 0);
HydroTree hydroTree = new HydroTree(currTime, 15, 300);
// Setup some default rainfall data
TimeSpan span = new TimeSpan(0, 1, 0);
int i = 0;
for (;i<5;i++)
{
rainfallCurve.Add(new TimeSeriesPoint(currTime, i/4.0));
currTime += span;
}
RainfallData myRainfall = new RainfallData(5.0, rainfallCurve);
OutletPoint myOutlet1 = new OutletPoint(hydroTree, null, 0.0, "1A");
OutletPoint myOutlet2 = new OutletPoint(hydroTree, myOutlet1, 200.0, "2A");
OutletPoint myOutlet3 = new OutletPoint(hydroTree, myOutlet1, 10.0, "3A");
OutletPoint myOutlet4 = new OutletPoint(hydroTree, myOutlet1, 80.0, "4A");
OutletPoint myOutlet5 = new OutletPoint(hydroTree, myOutlet2, 100.0, "5A");
OutletPoint myOutlet6 = new OutletPoint(hydroTree, myOutlet4, 60.0, "6A");
OutletPoint myOutlet7 = new OutletPoint(hydroTree, myOutlet5, 10.0, "7A");
SubBasin myBasin8 = new SubBasin(myOutlet1, 10.0, 10.0, myRainfall, 70.0, "8B");
SubBasin myBasin9 = new SubBasin(myOutlet1, 10.0, 10.0, myRainfall, 70.0, "9B");
SubBasin myBasin10 = new SubBasin(myOutlet2, 10.0, 10.0, myRainfall, 70.0, "10B");
SubBasin myBasin11 = new SubBasin(myOutlet3, 10.0, 10.0, myRainfall, 70.0, "11B");
SubBasin myBasin12 = new SubBasin(myOutlet4, 10.0, 10.0, myRainfall, 70.0, "12B");
SubBasin myBasin13 = new SubBasin(myOutlet5, 10.0, 10.0, myRainfall, 70.0, "13B");
SubBasin myBasin14 = new SubBasin(myOutlet6, 10.0, 10.0, myRainfall, 70.0, "14B");
SubBasin myBasin15 = new SubBasin(myOutlet7, 10.0, 10.0, myRainfall, 70.0, "15B");
string fileName = "C:\\hec1OutputPath\\WMLib.hc1";
const string hec1FileName = "C:\\hec1ExePath\\hec1.exe";
// Run HEC-1 and read the HEC-1 output hydrographs
if (hydroTree.RunHec1(fileName, hec1FileName))
{
// Get the peak flow and time before lagging
double peakFlow = hydroTree.GetPeakFlow();
DateTime peakTime = hydroTree.GetPeakTime();
// Write the hydrographs to a file that can be used by the time series editor
hydroTree.WriteTreeToTsFile("C:\\timeSeriesFilePath\\hydrographs.ts");
// Lag all hydrographs in the hydrologic tree
hydroTree.ApplyLagTimes();
// Get the peak flow and time after lagging
peakFlow = hydroTree.GetPeakFlow();
peakTime = hydroTree.GetPeakTime();
}
else
{
MessageBox.Show("Unable to run HEC-1");
}
}
catch (Exception ex)
{
MessageBox.Show("An Exception Occurred: " + ex.Message);
}
WMLib Classes
Help pages are available for understanding how each of the classes in WMLib are used. The following classes are available in WMLib:
- public class FileIo
- public class HydroTree
- public class OutletPoint
- public class RainfallData
- public class SubBasin
- public class TimeSeriesPoint
Contact the WMS developers for more information about and for and sample applications using the WMLib.
