Question: what is the surface area of the lagoon southwest of Dreverna

Context paragraphs:
Lake Taupo: Lake Taupo is a lake in the North Island of New Zealand.  It is in the caldera of the Taupo Volcano.  With a surface area of 616 km2 , it is the largest lake by surface area in New Zealand, and the second largest freshwater lake by surface area in geopolitical Oceania after Lake Murray (Papua New Guinea).  Motutaiko Island lies in the south east area of the lake.

BET theory: Brunauer–Emmett–Teller (BET) theory aims to explain the physical adsorption of gas molecules on a solid surface and serves as the basis for an important analysis technique for the measurement of the specific surface area of materials.  In 1938, Stephen Brunauer, Paul Hugh Emmett, and Edward Teller published the first article about the BET theory in the Journal of the American Chemical Society.  The BET theory applies to systems of multilayer adsorption and usually utilizes probing gases that do not chemically react with material surfaces as adsorbates to quantify specific surface area.  Nitrogen is the most commonly employed gaseous adsorbate used for surface probing by BET methods.  For this reason, standard BET analysis is most often conducted at the boiling temperature of N (77 K).  Further probing adsorbates are also utilized, albeit with lower frequency, allowing the measurement of surface area at different temperatures and measurement scales.  These have included argon, carbon dioxide, and water.  Specific surface area is a scale-dependent property, with no single true value of specific surface area definable, and thus quantities of specific surface area determined through BET theory may depend on the adsorbate molecule utilized and its adsorption cross section.

Kotychi: Kotychi (Greek: Κοτύχι ) is a lagoon in the northwestern part of Elis, Greece.  It straddles the boundaries of the municipal units Lechaina and Vouprasia.  It is located 23 km north of Amaliada and 45 km southwest of Patras.  The lagoon is connected with the Ionian Sea.  It is a protected wetland area, as recognized by the Ramsar Convention, The Kotychi lagoon is an important areas for waterbirds in Greece.  Its surface area is 3.7 km².

Lake Mistassini: Lake Mistassini (in French: "Lac Mistassini") is the largest natural lake by surface area in the province of Quebec, Canada, with a total surface area of approximately 2,335 km² and a net area (water surface area only) of 2,164 km².  It is located in the Jamésie region of the province, approximately 360 km east of James Bay.  The Cree town of Mistissini is located on Watson Peninsula in the south-east corner of the lake, which separates Baie du Poste from Abatagouche Bay.

Rodeo Lagoon: Rodeo Lagoon is a coastal lagoon located in the Marin Headlands division of the Golden Gate National Recreation Area, which is in southern Marin County, California.  This brackish water body is separated from the Pacific Ocean by a sand bar that forms Rodeo Beach.  Rodeo Lagoon stretches approximately 900 meters (3000 ft) by 250 meters (820 feet), and is about 2 meters (6.6 ft) deep at its maximum depth.  It covers a surface area of about 15 ha (37 acres).

Dreverna: Dreverna is a village located in the Klaipėda County, on the Dreverna river, southwest of the village is the Curonian Lagoon.

Chvorinov's rule: Chvorinov's Rule is a mathematical relationship first expressed by Nicolas Chvorinov in 1940, that relates the solidification time for a simple casting to the volume and surface area of the casting.  In simple terms the rule establishes that under otherwise identical conditions, the casting with large surface area and small volume will cool more rapidly than a casting with small surface area and a large volume.  The relationship can be written as:

Curonian Lagoon: The Curonian Lagoon (or Bay, Gulf; Russian: "Куршский залив" , Lithuanian: "Kuršių marios" , Polish: "Zalew Kuroński" , German: "Kurisches Haff" , Latvian: "Kuršu joma" ) is separated from the Baltic Sea by the Curonian Spit.  Its surface area is 1,619 km2 .  The Neman River (Lithuanian: "Nemunas" ) supplies about 90% of its inflows; its watershed consists of about 100,450 square kilometres in Lithuania and Russia's Kaliningrad Oblast.

Surface area: The surface area of a solid object is a measure of the total area that the surface of the object occupies.  The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra (i.e., objects with flat polygonal faces), for which the surface area is the sum of the areas of its faces.  Smooth surfaces, such as a sphere, are assigned surface area using their representation as parametric surfaces.  This definition of surface area is based on methods of infinitesimal calculus and involves partial derivatives and double integration.

Accessible surface area: The accessible surface area (ASA) or solvent-accessible surface area (SASA) is the surface area of a biomolecule that is accessible to a solvent.  Measurement of ASA is usually described in units of square Ångstroms (a standard unit of measurement in molecular biology).  ASA was first described by Lee & Richards in 1971 and is sometimes called the Lee-Richards molecular surface.  ASA is typically calculated using the 'rolling ball' algorithm developed by Shrake & Rupley in 1973.  This algorithm uses a sphere (of solvent) of a particular radius to 'probe' the surface of the molecule.

Supporting paragraphs: Dreverna Curonian Lagoon
Answer: 1,619 km2