Question: Which canal is the largest and most important drainage canal in the city of New Orleans, the 17th Street Canal or Champlain Canal?

full_context: Document 1: Industrial Canal Lock: The Inner Harbor Navigation Canal Lock—commonly known as Industrial Canal Lock or simply Industrial Lock—is a navigation lock in New Orleans. It connects the Lower Mississippi River to the Industrial Canal and other sea-level waterways. Because it is shorter and narrower than most modern locks on the Mississippi River System, the 1920s vintage lock has become a bottleneck between the nation's two highest-tonnage waterways—the Mississippi and the Gulf Intracoastal Waterway.
Document 2: London Avenue Canal: The London Avenue Canal is a drainage canal in New Orleans, Louisiana, used for pumping rain water into Lake Pontchartrain. The Canal runs through the 7th Ward of New Orleans from the Gentilly area to the Lakefront. It is one of the three main drainage canals responsible for draining rainwater from the main basin of the city of New Orleans. The London Avenue Canal's flood walls built atop earthen levees breached on both sides during Hurricane Katrina in 2005.
Document 3: Erie Canal: The Erie Canal is a canal in New York that is part of the east–west, cross-state route of the New York State Canal System (formerly known as the New York State Barge Canal). Originally, it ran 363 mi from Albany, on the Hudson River, to Buffalo, at Lake Erie. It was built to create a navigable water route from New York City and the Atlantic Ocean to the Great Lakes. When completed in 1825, it was the second longest canal in the world (after the Grand Canal in China) and greatly affected the development and economy of New York, New York City, and the United States.
Document 4: Seneca River Crossing Canals Historic District: Seneca River Crossing Canals Historic District is a national historic district located at Montezuma and Tyre in Cayuga and Seneca Counties, New York. The district includes more than a mile of the Enlarged Erie Canal prism (built here between 1849 and 1857); towpath and heelpath; a drydock; the remains of the Richmond (Montezuma) Aqueduct crossing the Seneca River; remnants of the original Erie Canal, built between 1817 and 1825 and including Lock #62 and piers of the original mule bridge from that era; and a culvert that carries a stream beneath the Enlarged Erie Canal.
Document 5: Chemung Canal: The Chemung Canal is a former canal in New York, United States. The canal connected Seneca Lake at Watkins Glen to the Chemung River at Elmira, New York. It was planned to connect the Finger Lakes region and Pennsylvania's Susquehanna River watershed with New York's Erie Canal system. The latter connected the Great Lakes with the Hudson River and ultimately the Atlantic port of New York City.
Document 6: New York State Canal System: The New York State Canal System (formerly known as the New York State Barge Canal) is a successor to the Erie Canal and other canals within New York. Currently, the 525 mi system is composed of the Erie Canal, the Oswego Canal, the Cayuga–Seneca Canal, and the Champlain Canal. In 2014 the system was listed as a national historic district on the National Register of Historic Places in its entirety, and in 2016 it was designated a National Historic Landmark.
Document 7: Champlain Canal: The Champlain Canal is a 60 mi canal that connects the south end of Lake Champlain to the Hudson River in New York. It was simultaneously constructed with the Erie Canal and is now part of the New York State Canal System and the Lakes to Locks Passage.
Document 8: Orleans Canal: The Orleans Canal is a drainage canal in New Orleans, Louisiana. The canal, along with the 17th Street Canal and the London Avenue Canal, form the New Orleans Outfall Canals. The current version of the canal is about 2 km long, running along the up-river side of City Park, through the Lakeview and Lakeshore neighborhood, and into Lake Pontchartrain. It is part of the system used to pump rain water out of the streets of the city into the Lake. The Canal has also been known as the Orleans Avenue Canal, the Orleans Outfall Canal, the Orleans Tail Race, and early on, the Girod Canal,
Document 9: Industrial Canal: The Industrial Canal is a 5.5 mile (9 km) waterway in New Orleans, Louisiana, United States. The waterway's proper name, as used by the U.S. Army Corps of Engineers and on NOAA nautical charts, is Inner Harbor Navigation Canal (IHNC). The more common "Industrial Canal" name is used locally, both by commercial mariners and by landside residents.
Document 10: 17th Street Canal: The 17th Street Canal is the largest and most important drainage canal in the city of New Orleans. Operating with Pump Station 6, It moves water into Lake Pontchartrain. The canal, along with the Orleans Canal and the London Avenue Canal, form the New Orleans Outfall Canals. The 17th Street Canal forms a significant portion of the boundary between the city of New Orleans and Metairie, Louisiana. The canal has also been known as the Metairie Outlet Canal and the Upperline Canal.
Document 11: Chenango Canal: The Chenango Canal was a towpath canal built and operated in the mid-19th century in Upstate New York in the United States. It was 97 miles long and for much of its course followed the Chenango River, along Rt. 12 N-S from Binghamton on the south end to Utica on the north end. It operated from 1834 to 1878 and provided a significant link in the water transportation system of the northeastern U.S., connecting the Susquehanna River to the Erie Canal.
Document 12: Black River Canal: The Black River Canal was a canal built in northern New York in the United States to connect the Erie Canal to the Black River. The canal had 109 locks along its 35 mi length. Remains of several of the canal's former locks are visible along New York State Route 12 near Boonville.
Document 13: Seabrook Floodgate: The Inner Harbor Navigation Canal (IHNC) Seabrook Floodgate Structure is a flood barrier in the Industrial Canal in New Orleans, Louisiana. The floodgate is designed to protect the Industrial Canal and the surrounding areas from a storm surge from Lake Ponchartrain. It consists of two 50 ft wide vertical lift gates and a 95 ft wide sector gate.
Document 14: Lowell Power Canal System and Pawtucket Gatehouse: The Lowell Power Canal System is the largest power canal system in the United States, at 5.6 miles in length. The system's estimated output is 10,000 horsepower, operating six major canals on two levels, controlled by numerous gates. The system was begun in the 1790s, beginning its life as a transportation canal called the Pawtucket Canal, which was constructed to get logs from New Hampshire down the Merrimack River to shipbuilding centers at Newburyport, Massachusetts, bypassing the 30-plus-foot drop of the Pawtucket Falls.
Document 15: New Orleans Outfall Canals: There are three outfall canals in New Orleans, Louisiana – the 17th Street, Orleans Avenue and London Avenue canals. These canals are a critical element of New Orleans’ flood control system, serving as drainage conduits for much of the city. There are 13 mi of levees and floodwalls that line the sides of the canals. The 17th Street Canal is the largest and most important drainage canal and is capable of conveying more water than the Orleans Avenue and London Avenue Canals combined.
ground_truth: 17th Street Canal