Lakes

Sambhar Lake is a saltwater lake located in Rajasthan. For exams link it with salt production and dry region.

An oxbow lake forms when an old river bend is cut off. For exams connect it with plain rivers and meanders.

Chilika is a coastal lagoon near the Odisha coast. For exams remember a lagoon as a sea influenced coastal lake.

Wular Lake is a famous freshwater lake of Jammu and Kashmir. For exams remember water type and location together.

Silt makes a lake shallow and reduces water storage. For exams treat siltation as a major lake conservation issue.

Loktak Lake in Manipur is famous for phumdis. For exams understand it as a special wetland lake of Northeast India.

The direct answer is D. Gobind Sagar is the reservoir formed in connection with the Bhakra-Nangal Dam, so it is artificial rather than a naturally formed lake. The reasoning is: a dam is built across a river; the dam holds back river water; the stored water spreads into a reservoir; this reservoir is called Gobind Sagar. Option D is correct. Option A is wrong because a sea lagoon is a coastal water body separated partly from the sea, not the origin of Gobind Sagar. Option B describes an oxbow lake formed when a river meander is cut off, which is not this case. Option C describes a lake formed in a meteorite impact crater, also unrelated here. A reservoir may look like a lake, but its main origin is human construction and water storage. Exam cue: Bhakra-Nangal Dam points to Gobind Sagar.

A lagoon in a coastal area can be influenced by both sea and land water. For exams take Chilika and Pulicat as such examples.

Pulicat Lake is a coastal lagoon on the eastern coast. For exams study it with Chilika as a lagoon example.

Excess nutrients can increase algal growth and affect oxygen and water quality. For exams connect eutrophication with pollution.

Lonar Lake in Maharashtra is linked with a meteorite impact crater. For exams remember it as a lake of special origin.

Kolleru Lake is located in Andhra Pradesh between the Krishna and Godavari delta regions. For exams connect it with the eastern coastal plain.

Vembanad is a major backwater lake of Kerala. For exams remember it with South India and backwaters.

Rainfall increases water and evaporation can reduce it. For exams connect lake water level with water balance.

Deforestation can increase soil erosion and silt entering the lake. For exams connect lake conservation with the catchment area.

Pollution reduces water quality and silt reduces water capacity. For exams match problems with their effects.

Population pressure can increase waste and encroachment. For exams remember human pressure in lake conservation.

Glaciers can create spaces for lakes by erosion or barriers. For exams connect mountain lakes with glacial action.

Lakes support wetland ecology and many organisms. For exams connect ideas like Ramsar with conservation.

Uncontrolled tourism can increase waste and pollution in a lake. For exams understand the balance between use and conservation.

Chilika and Pulicat are lagoons while Sambhar is an inland saline lake. For exams remember the difference through examples.

Catchment management helps protect lake water quality and depth. For exams connect lake conservation with the whole area.

Vembanad is linked with Kerala backwaters and Pulicat with an eastern coastal lagoon. For exams identify coastal lakes.

For sustainable fishing water quality and habitat must remain protected. For exams link economic use with conservation.

Encroachment can reduce lake area and lower water storage and flood control. For exams remember shore protection.