PDA vs DDA
PDA stands for "Pressure-Driven Approach" and DDA can stand for "Demand-Driven Approach".
Pressure-Driven Approach (PDA):
In a pressure-driven approach, the flow within the stormwater network is determined primarily by the hydraulic pressure gradients within the pipes. This method focuses on simulating the flow patterns based on the pressure differences between nodes, and it typically uses algorithms to solve for flow velocities and directions based on these pressure gradients. PDA is useful for understanding how water moves through the network under different hydraulic conditions, especially in pressurized systems. Demand-Driven Approach (DDA):
In a demand-driven approach, the flow within the stormwater network is driven by the demands placed on the system, such as the inflow rates from rainfall, runoff, and other sources. This method emphasizes the modeling of demands and the allocation of these demands throughout the network based on various factors such as land use, rainfall intensity, and hydraulic constraints. DDA is useful for simulating scenarios where the focus is on meeting specific demands within the network, such as drainage requirements or water supply needs. In summary, in the context of SWMM, PDA (Pressure-Driven Approach) and DDA (Demand-Driven Approach) refer to different methodologies for simulating flow within stormwater networks, with PDA focusing on pressure-driven flow patterns and DDA focusing on demand-driven flow allocation.
Current Database Dumps
These Database Dumps can be found on Sharepoint Database Dumps The Grafana Dumps Json files can be found on Sharepoint Grafana Json Files Template for Power Bi.
Versions of the PDA vs DDA files
These are MTW files. There are 3 types of files.
- leak_at_J-224_as_emitter
- no_leak
- all_nodes_as_emitters_with_zero_base_demand
There are different files for DDA and PDA. So there are 6 inp files in total.