hydrotools.nwis-client 3.0.5

A convenient interface to the USGS NWIS Instantaneous Values (IV) REST Service API.

OWPHydroTools :: NWIS Client

This subpackage implements an interface to the USGS NWIS Instantaneous Values Web Service. The primary use for this tool is to populate pandas.Dataframe objects with USGS streamflow data. See the NWIS Client Documentation for a complete list and description of the currently available methods. To report bugs or request new features, submit an issue through the OWPHydroTools Issue Tracker on GitHub.

Installation

In accordance with the python community, we support and advise the usage of virtual environments in any workflow using python. In the following installation guide, we use python's built-in venv module to create a virtual environment in which the tool will be installed. Note this is just personal preference, any python virtual environment manager should work just fine (conda, pipenv, etc. ).

# Create and activate python environment, requires python >= 3.8
$ python3 -m venv venv
$ source venv/bin/activate
$ python3 -m pip install --upgrade pip

# Install nwis_client
$ python3 -m pip install hydrotools.nwis_client

Usage

The following example demonstrates how one might use hydrotools.nwis_client to retrieve USGS streamflow observations.

Code

# Import the NWIS IV Client
from hydrotools.nwis_client.iv import IVDataService

# Retrieve data from a single site
service = IVDataService(
    value_time_label="value_time"
)
observations_data = service.get(
    sites='01646500',
    startDT='2019-08-01',
    endDT='2020-08-01'
    )

# Look at the data
print(observations_data.head())

Output

           value_date variable_name usgs_site_code measurement_unit   value qualifiers  series
0 2019-08-01 04:00:00    streamflow       01646500            ft3/s  4170.0        [A]       0
1 2019-08-01 04:15:00    streamflow       01646500            ft3/s  4170.0        [A]       0
2 2019-08-01 04:30:00    streamflow       01646500            ft3/s  4170.0        [A]       0
3 2019-08-01 04:45:00    streamflow       01646500            ft3/s  4170.0        [A]       0
4 2019-08-01 05:00:00    streamflow       01646500            ft3/s  4170.0        [A]       0