Question: Which is an irrigation canal, the New Orleans Outfall Canals or the Buena Vista Canal?
Context: 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. 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. Beardsley Canal is an irrigation canal in Kern County, California.  It originates for the Kern River, east of Gordon's Ferry and just west of the First Point of Measurement.  It is the first diversion from the river in the San Joaquin Valley for agriculture irrigation (Hart Park has two canals, but are used exclusively for aesthetics and reconnect to the river).  It terminates at reservoirs located in Famoso, just east of SR 99 (Golden State Freeway). Buena Vista Slough was the joint outlet of an overflowing Buena Vista Lake and a distributary of the Kern River into Tulare Lake.  It is now diverted into a system of canals by the Outlet Canal of the Central Valley Project. 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. The Riverside Canal is an irrigation canal in El Paso County beginning southeast of El Paso, Texas.  The canal acquires water from the Riverside Diversion Dam on the Rio Grande 15 mi southeast of El Paso.  The canal is managed by the US Bureau of Reclamation.  The canal extends for 17.2 mi with a capacity of 900 cubic feet per second.  Water from the canal irrigates about 39,000 acres (160 km²).  The canal and diversion dam is the southernmost system on an irrigation project extending along the Rio Grande in New Mexico and Texas.  The canal supplies a canal network extending throughout the Upper Rio Grande Valley. The All-American Canal is an 80-mile (130 km) long aqueduct, located in southeastern California.  It conveys water from the Colorado River into the Imperial Valley and to nine cities.  It is the Imperial Valley's only water source, and replaced the Alamo Canal, which was located mostly in Mexico.  The Imperial Dam, about 30 miles (48 km) northeast of Yuma, Arizona on the Colorado River, diverts water into the All-American Canal, which runs to just west of Calexico, California before its last branch heads mostly north into the Imperial Valley.  Five smaller canals branching off the All American Canal move water into the Imperial Valley.  These canal systems irrigate up to 630,000 acres (250,000 ha) of crop land and have made possible a greatly increased crop yield in this area, originally one of the driest on earth.  It is the largest irrigation canal in the world, carrying a maximum of 26,155 cubic feet per second (740.6 m/s).  Agricultural runoff from the All American Canal drains into the Salton Sea. The Mulwala Canal is an irrigation canal in the southern Riverina region of New South Wales, Australia.  It is the largest irrigation canal in the Southern Hemisphere.  The canal, starting at Lake Mulwala, diverts water from the Murray River across the southern Riverina plain to the Edward River at Deniliquin.  The channel has an offtake capacity of 10,000 megalitres (ML) per day and annually supplies over 1,000,000 ML to 700000 ha in the Murray Irrigation Area. 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, Buena Vista Canal is an irrigation canal in Kern County, California.  It originates from the Carrier Canal at Coffee Road.  The canal terminates at Lake Webb (and Buena Vista Lakebed) and the Kern River.
Answer: Buena Vista Canal