Flow duration curve plotting

[jnvn7]

Describe the bug:

There seems to be an issue with plotting the flow duration curve in the updated 0.8.x version. It was producing the expected plot in the 0.7.x version.

In particular, when using commit 2ccc286, I got the following plot

When using latest commit, I got

To Reproduce:

Sample script:

#!/usr/bin/env python3
#-----------------------------------------------------------------------#
from mhkit import river
import matplotlib.pyplot as plt
#-----------------------------------------------------------------------#
# Obtain 5 years of daily discharge data
data = river.io.usgs.request_usgs_data(station="04216000",
                                       parameter='00060',
                                       start_date='2017-01-01',
                                       end_date='2022-01-31',
                                       data_type='Daily')

data = data.rename(columns={data.columns[0]: 'Q'})
data = data.reset_index()

# Convert to discharge data from ft3/s to m3/s
data.Q = data.Q/(3.28084)**3

# Calculate exceedence probability (flow duration curve)
data['ExcP'] = river.resource.exceedance_probability(data.Q)

# Plot FDC
fig = plt.axes()
river.graphics.plot_flow_duration_curve(data.Q, data.ExcP, ax=fig)
plt.show()

Expected behavior:

There should be only one curve in the flow duration plot (discharge vs. exceedance probability).

Desktop (please complete the following information):

• OS: N/A
• MHKiT Version: 0.8.x

[ssolson]

Thanks @jnvn7. I'm going to look into this now.

[ssolson]

@jnvn7 this will be fixed in develop by #365 and released in version 0.9.0 which will go through hopefully this month via #361.

[jnvn7]

Sounds good. Thanks @ssolson!