Waters and hydrographic features

Naryn

Naryn (Нарын), river in Kyrgyzstan and Uzbekistan, major tributary of the Syr Darya; about 600 km long, meltwater-fed, and the site of the 2870 MW Naryn hydropower cascade including Toktogul.

National wetland policy in Africa, Latin America, the Pacific and the Middle East

National wetland policy in Africa, Latin America, the Pacific, and the Middle East covers the country-level laws, programs, and institutions governing wetlands outside regions with the most developed statutes.

National wetland policy in Asia

National wetland policy in Asia is the set of laws and rules by which Asian countries protect and manage their wetlands, with China's first comprehensive statute effective June 2022.

National wetland policy: comparative structures and inventory programs

A national wetland policy is the set of laws, permits, and inventory programs by which a country protects, regulates, and maps its wetlands, using models that differ widely.

National Wetlands Inventory

National Wetlands Inventory (NWI), a 1974 U.S. Fish and Wildlife Service program, maps U.S. wetlands and deepwater habitats using the Cowardin classification, publishes the Wetlands Mapper and Status and Trends reports, and is not a jurisdictional wetland determination.

Natural drainage system

A natural drainage system is the network of stream channels and land paths that collect runoff from a drainage basin and convey it to a common outlet.

Natural resources of the Arctic

Natural resources of the Arctic: petroleum, minerals, and fisheries north of the Arctic Circle across eight countries. USGS estimates 90 billion barrels oil and 1,669 tcf gas, mostly offshore and Russian, largely undeveloped due to cost, climate, and regulation.

Naurzum Lake System

Naurzum Lake System (Наурзум), Ramsar site no. 1872 in Kostanay Region, Kazakhstan: about 26 shallow steppe lakes of 139,714 ha within Naurzum State Nature Reserve, a Saryarka World Heritage component and key Siberian Crane stopover, designated 12 July 2009.

Nazca Ridge

Nazca Ridge: volcanic aseismic ridge on the Nazca plate, ~1,100 km long, part of the Salas y Gómez hotspot trail (1.4-30 Ma lavas), now subducting flat-slab beneath southern Peru; 1996 Mw 8.0 earthquake; high marine endemism.

Neale

Lake Neale: intermittent salt lake (playa) in the Petermann locality, Northern Territory, Australia, northwest of Lake Amadeus; named 1930 for pilot Frank Neale; part of the Hopkins-to-Finke salt lake chain in the Amadeus Basin.

Negro (river, Colombia)

Río Negro (Colombia): name shared by several rivers, including a Magdalena tributary in Cundinamarca–Boyacá (4,238 km² basin), the Antioquia Negro–Nare river, and the Amazonian Rio Negro, called the Guainía in Colombia.

Negro (river, Uruguay)

Río Negro (Uruguay): 850 km river rising in Brazil's sierra de Santa Tecla, principal tributary of the Uruguay River, dividing Uruguay north and south; basin 68,214 km2, flow 520 m3/s, three UTE hydroelectric dams, monitored for water quality since 2009.

Neiriz Lakes & Kamjan Marshes

Neiriz Lakes & Kamjan Marshes (Neyriz Lakes and Kamjan Marshes), Ramsar site no. 39 in Fars, Iran, designated 1975: saline Lakes Bakhtegan and Tashk plus freshwater Kamjan Marshes, 108,000 ha, on the Montreux Record since 1990 and shrinking from drainage, dams, and drought.

Nejanilini

Nejanilini Lake, a large lake in northern Manitoba, Canada, of Dene Suline (Chipewyan) name origin, official since 1944; area 263.346 km2, at tree line near the Manitoba-Nunavut border, namesake of a studied low-Arctic region.

Nelson

Nelson, here the Nelson River in Manitoba, Canada: fourth longest Canadian river, draining over 1.2 million km2 from Lake Winnipeg to Hudson Bay and anchoring Manitoba Hydro's regulated hydroelectric system.

Nelson Strait

Nelson Strait (Nelson, estrecho) is a strait in the South Shetland Islands between Nelson and Robert Islands at 62°20'S 59°18'W, formerly called Harmony Strait, King George's Strait, and Parrys Straits.

Nemunas Delta

The Nemunas Delta (Nemuno delta) is the river delta at the mouth of the Nemunas, Lithuania's largest river, where it empties into the Curonian Lagoon, protected as a regional park and Ramsar wetland.

Nen

Nen (Nenjiang, 嫩江) is the largest tributary of the Songhua River in Northeast China, 1,370 km long, draining about 297,000 km2 across Heilongjiang, Inner Mongolia, and Jilin; noted for wetlands, the Nierji Dam, and Angangxi prehistoric culture.

Neptunes Bellows

Neptunes Bellows (Fuelles de Neptuno) is the roughly 230 m wide, 25 m deep strait between Fildes Point and Entrance Point, Deception Island, the sole ship entrance through the caldera wall into Port Foster, guarded by submerged Ravn Rock.

Neretva

The Neretva is a roughly 225 km transboundary river of Bosnia and Herzegovina and Croatia flowing to the Adriatic, where its delta is a Ramsar wetland since 1992 with high endemism, regulated by hydropower dams.

Nettilling

Nettilling Lake, the largest lake in the Canadian Arctic Archipelago and largest lake on an island, on Baffin Island, Nunavut; about 5,542 km², drained by the Koukdjuak River to Foxe Basin.

Neumayer Channel

Neumayer Channel is a 16-mile NE-SW Antarctic channel in the Palmer Archipelago separating Anvers Island from Wiencke and Doumer Islands, first charted by the Belgian Antarctic Expedition in 1898 and named for Georg von Neumayer.

Neuse River

The Neuse River (Gow-ta-no) is a 250-mile North Carolina river formed by the Eno and Flat Rivers, draining to Pamlico Sound; longest river entirely within the state, home of the CSS Neuse wreck.

Neva (Нева)

Neva (Нева): short (74-78 km) river draining Lake Ladoga into the Gulf of Finland at Saint Petersburg; discharge about 2,500 m3/s, catchment 281,000 km2, delta city, 286 floods, and the 25.4 km flood barrier in operation since 2011.

New Bedford Inlet

New Bedford Inlet is a large ice-filled embayment between Cape Kidson and Cape Brooks on the Lassiter Coast, Palmer Land, Antarctica; discovered by USAS air photography in December 1940 and named after New Bedford, Massachusetts.

New Britain Trench

New Britain Trench: oceanic trench in the Solomon Sea, Papua New Guinea, also called Bougainville-New Britain Trench. Solomon Sea Plate subducts northward at 80-150 mm/yr; ~840 km long, up to 9,103 m deep, PNG's most seismically active source.

New Guinea Central Mountains

New Guinea Central Mountains (FEOW ecoregion 814) is a montane freshwater ecoregion along New Guinea's Central Highlands from Cenderwasih Bay to the Huon Gulf, with over 20 endemic fish species including Lake Kutubu Mogurnda gudgeons.

New Guinea North Coast

New Guinea North Coast (FEOW ecoregion 813) is a freshwater ecoregion spanning northern New Guinea from the Schouten Islands to the Huon Peninsula, with the Mamberamo, Sepik, Ramu, and Markham rivers and 50 endemic fish species including rainbowfish genera Glossolepis and Chilatherina.

New York Harbor

New York Harbor is the tidal estuary and natural deepwater port at the Hudson River mouth shared by New York and New Jersey. Busiest world harbor by 1865; today hosts NOAA NYOFS/PORTS navigation systems and major oyster and habitat restoration.