subbasin

noun

sub·​ba·​sin ˌsəb-ˈbā-sᵊn 

variants or sub-basin

plural subbasins or sub-basins

: a geologic basin formed within or as part of another basin

sediment samples taken from the subbasins of the watershed

Examples of subbasin in a Sentence

Recent Examples on the Web

But in the decades since, the forest the trees form has deteriorated — just as the town has pumped too much water out of its underground subbasin to sustain its farms, resorts, golf courses and some 3,000 residents. — Lucas Robinson, San Diego Union-Tribune, 17 May 2026

In the San Joaquin Valley, the Delta-Mendota subbasin has become the fourth farming area to avoid being placed on groundwater probation by state regulators. — Ian James, Los Angeles Times, 9 Apr. 2026

However, the subbasin groundwater agency still needs at least two years’ worth of data to come up with a suitable sustainability plan, according to Main. — Camila Pedrosa, Sacbee.com, 11 Feb. 2026

The region lies at the edge of one of the valley’s major subsidence zones, where sinking land has damaged the Friant-Kern Canal — a critical piece of water infrastructure in the Central Valley that runs directly through the subbasin. — Chaewon Chung december 3, Sacbee.com, 3 Dec. 2025

Tule and Tulare Lake subbasins, meanwhile, were put on probation. — Chaewon Chung december 3, Sacbee.com, 3 Dec. 2025

The new pool was found in a subbasin at the Norris Geyser Basin, which is the park's hottest and oldest thermal area. — Melina Khan, USA Today, 16 July 2025

After the board took its first vote to intervene in the neighboring Tulare Lake subbasin in April, farmers sued in an effort to overturn the decision, arguing the state’s demands are unreasonable and damaging to the local economy. — Ian James, Los Angeles Times, 21 Sep. 2024

In one area of the Tule subbasin west of Tipton, state officials said, the ground has sunk more than seven feet since 2015. — Ian James, Los Angeles Times, 21 Sep. 2024

Word History

First Known Use

1832, in the meaning defined above

Rhymes for subbasin

• capsaicin
• disseisin
• freemason
• stonemason
• unfasten
• washbasin
• basin
• caisson
• chasten
• hasten
• jason