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The Delta-to-Delta Circuit

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The Delta-to-Y Circuit

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In the delta-wye circuit, the source is delta-connected, while the load is in a wye configuration. This means that the phase voltage of the delta-connected source is equal to the line voltage of the wye-connected load. The connection between two-line currents originates from the delta-connected source. The phase difference in the balanced system allows for calculating one line current given the other, utilizing the positive sequence of phases. In the delta-wye system, the phase currents in the...

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Related Experiment Video

Updated: May 11, 2026

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Published on: April 23, 2018

Man made deltas.

Vittorio Maselli¹, Fabio Trincardi

¹Istituto di Scienze Marine, ISMAR-CNR, Bologna, Italy. vittorio.maselli@bo.ismar.cnr.it

Scientific Reports

|June 1, 2013

Summary

Southern European deltas grew rapidly during the Roman Empire and Little Ice Age due to human activity. Both delta growth phases were followed by retreat, driven by different environmental factors.

Area of Science:

Geosciences
Environmental Science
Quaternary Science

Background:

Southern European deltas exhibit complex geomorphological histories.
Deltaic evolution is influenced by climate change and anthropogenic pressures.

Purpose of the Study:

To analyze geochronological and historical data for major Southern European deltas.
To identify synchronous growth phases and understand their drivers and consequences.

Main Methods:

Review of geochronological data.
Analysis of historical records.
Paleoenvironmental reconstruction.

Main Results:

Largest deltas formed synchronously during Roman Empire and Little Ice Age.

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Delta growth phases were followed by retreat due to distinct factors.

Post-Roman retreat linked to reduced erosion; industrial-era retreat linked to dams and subsidence.

Conclusions:

Human impact on landscapes drives synchronous delta growth.
Contrasting factors cause delta retreat under different climatic and anthropogenic regimes.
Modern deltas face amplified threats from subsidence and sea-level rise.