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pipedream _🚰 ^💭

An interactive hydrodynamic solver for sewer/stormwater networks.

About

Pipedream is a physically-based sewer/stormwater model designed for real-time applications. The pipedream toolkit consists of four major components:

• A hydraulic solver based on the 1D Saint-Venant equations.
• An infiltration solver based on the Green-Ampt formulation.
• A water quality solver based on the 1D advection-reaction-diffusion equation (experimental).
• An interactive simulation manager that facilitates real-time data assimilation and control.

Example use-cases for pipedream include:

• Real-time detection and forecasting of urban flooding.
• Implementation of real-time control strategies for combined sewer overflows.
• Stormwater asset management and detection of maintenance emergencies.
• Data-driven water quality assessment.

Documentation

• Read the docs here 📖.

• Read the paper here 📄.

Installation

Use pip to install pipedream-solver via pypi:

$ pip install pipedream-solver

Currently, only Python 3 is supported.

Dependencies

The following dependencies are required to install and use the pipedream toolkit:

• numpy (>= 1.18)
• pandas (>= 0.25)
• scipy (>= 1.5)
• numba (>= 0.40)
• matplotlib (>= 3.0)

Listed version numbers have been tested and are known to work (this does not necessarily preclude older versions).

A Minimal Example

Import modules and load data

# Import modules
import pandas as pd
from pipedream_solver.hydraulics import SuperLink
from pipedream_solver.simulation import Simulation

# Specify data path
input_path = './data/six_pipes'

# Get model components
superjunctions = pd.read_csv(f'{input_path}/superjunctions.csv')
superlinks = pd.read_csv(f'{input_path}/superlinks.csv')
junctions = pd.read_csv(f'{input_path}/junctions.csv')
links = pd.read_csv(f'{input_path}/links.csv')

# Read input data
Q_in = pd.read_csv(f'{input_path}/flow_input.csv', index_col=0)
H_bc = pd.read_csv(f'{input_path}/boundary_stage.csv', index_col=0)

Run superlink

# Instantiate superlink model
superlink = SuperLink(superlinks, superjunctions, links, junctions)

# Set constant timestep (in seconds)
dt = 30

# Create simulation context manager
with Simulation(superlink, Q_in=Q_in, H_bc=H_bc) as simulation:
    # While simulation time has not expired...
    while simulation.t <= simulation.t_end:
        # Step model forward in time
        simulation.step(dt=dt, num_iter=1)
        # Record internal depth and flow states
        simulation.record_state()
        # Print progress bar
        simulation.print_progress()

[==================================================] 100.0% [0.82 s]

Plot results

See plotting code here.

Acknowledgments

Hydraulic solver based on the SUPERLINK scheme proposed by Zhong Ji (1998).

Ji, Z. (1998). General Hydrodynamic Model for Sewer/Channel Network Systems.
Journal of Hydraulic Engineering, 124(3), 307–315.
doi: 10.1061/(asce)0733-9429(1998)124:3(307)