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:

1. 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.
2. Run HEC-1 and read the HEC-1 output hydrographs.
3. 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)
4. Lag all the hydrographs in the hydrologic tree. (optional)
5. 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);
    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

WMLib

Introduction and examples
public class FileIo · public class HydroTree · public class OutletPoint · public class RainfallData · public class SubBasin · public class TimeSeriesPoint