Question: Which canal is longer at 77 miles long, The Madera Canal or The Miami Canal?

Context paragraphs:
Delta–Mendota Canal: The Delta–Mendota Canal is a 117 mi aqueduct in central California, United States.  It is part of the Central Valley Project and its purpose is to replace water in the San Joaquin River that is diverted into Madera Canal and Friant-Kern Canal at Friant Dam.  Average annual throughput is 1993000 acre feet .

History of Over-the-Rhine: The history of Over-the-Rhine is almost deep as the history of Cincinnati.  Over-the-Rhine's built environment has undergone many cultural and demographic changes.  The toponym "Over-the-Rhine" is a reference to the Miami and Erie Canal as the Rhine of Ohio.  An early reference to the canal as "the Rhine" appears in the 1853 book "White, Red, Black", in which traveler Ferenc Pulszky wrote, "The Germans live all together across the Miami Canal, which is, therefore, here jocosely called the 'Rhine.' "  In 1875 writer Daniel J. Kenny referred to the area exclusively as "Over the Rhine."  He noted, "Germans and Americans alike love to call the district 'Over the Rhine.' "

Birmingham and Warwick Junction Canal: The Birmingham and Warwick Junction Canal is a short canal connecting the Digbeth Branch of the Birmingham and Fazeley Canal in the centre of Birmingham ( ) to the Warwick and Birmingham Canal near Gravelly Hill Interchange ( ).  It was authorized in 1840 by Act of Parliament to relieve pressure on this connection to the Grand Junction Canal leading to London and opened in 1844.  It is 2.5 miles long and has 6 locks.

Kensington Canal: The Kensington Canal was a canal, about two miles long, opened in 1828 in London from the River Thames on the parish boundary between Chelsea and Fulham, along the line of Counter's Creek, to a basin near Warwick Road in Kensington.  It had one lock near the Kensington Basin and wharves on the Fulham side, south of Lillie bridge.  It was not commercially successful, and was purchased by a railway company, which laid a line along the route of the canal on the Fulham side.  A second railway line followed in the filled-in littoral of the canal, thus one became London Underground's Wimbledon branch and the other, the West London Line.

New River (Broward County, Florida): The New River is a tidal estuary in South Florida, United States.  The river is connected to the Everglades through a series of man made canals.  After passing through Fort Lauderdale, the river connects to the Atlantic Ocean at Port Everglades cut.  The river is entirely within Broward County and is composed from the junction of three main canals which originate in the Everglades, splitting off from the Miami Canal.  They are the North New River Canal, which flows on the north side of State Road 84 / Interstate 595; the South New River Canal, which flows on the north side of Griffin Road and the south side of Orange Drive; and a canal which flows south of Sunrise Boulevard.

Junction Canal: The Junction Canal was a canal in the states of New York and Pennsylvania in the United States.  The canal was also called the Arnot Canal, after the name of its principal stockholder, John Arnot of Elmira, New York.  The canal was built and operated by a private stock company.  The canal was partly open in 1854, but the entire length was not finished until 1858.  The completed canal was 18 mi long and had 11 locks.  Then intent was to lengthen the reach of the Chemung Canal deeper into Pennsylvania in order to connect to the canal systems there.  Competition with railroads led to diminished use of the canal.  In 1865 the canal was severely damaged by a flood.  In 1866, the stock company was authorized to change its name to the "Junction Canal and Railroad Company," and work commenced in constructing a railroad on its right of way.  The canal was last used in 1871, and was then abandoned.

Miami Canal: The Miami Canal, or C-6 Canal, flows from Lake Okeechobee in the U.S. state of Florida to its terminus at the Miami River, which flows through downtown Miami.  The canal flows in a south and southeasterly direction for approximately 77 miles, and passes through three counties: Broward, Palm Beach, and Miami-Dade.  It was constructed in the early part of the 20th century to drain the Everglades Agricultural Area (EAA).

Madera Canal: The Madera Canal is a 35.9 mi aqueduct in the U.S. state of California.  It is part of the Central Valley Project managed by the United States Bureau of Reclamation to convey water north to augment irrigation capacity in Madera County, California.  It was also the subject of the United States Supreme Court's decision in Central Green Co. v. United States.

Shamiram canal: The Shamiram canal also known as Semiramis canal previously Menua canal is a canal located east of Van that runs 45 miles long supplying a large region.  King Menua built the Semiramis canal, according to his inscriptions, which are still visible by the canal.  Menua's canal, which brought fresh water to the capital city of Tushpa, has survived to the present day and is known to the people of the Van region as the "canal of Semiramis,".

Wabash and Erie Canal: The Wabash and Erie Canal was a shipping canal that linked the Great Lakes to the Ohio River via an artificial waterway.  The canal provided traders with access from the Great Lakes all the way to the Gulf of Mexico.  Over 460 miles long, it was the longest canal ever built in North America.

Supporting paragraphs: Madera Canal Miami Canal
Answer: The Miami