Analyzing Reservoir and State Matching

This question asks us to evaluate four pairs of Reservoirs and their associated States to determine how many pairs are incorrectly matched. To answer this, we need to verify the correct location (State) for each listed reservoir.

Verification of Each Reservoir-State Pair

Let's examine each given pair:

1. Ghataprabha – Telangana: The Ghataprabha Reservoir is built on the Ghataprabha River. This reservoir is located in the state of Karnataka, specifically near Hidkal village in Belagavi district. Therefore, the pair Ghataprabha – Telangana is not correctly matched.
2. Gandhi Sagar – Madhya Pradesh: The Gandhi Sagar Dam and Reservoir are part of the Chambal Valley Projects. This reservoir is indeed located in the Mandsaur and Neemuch districts of the state of Madhya Pradesh. Thus, the pair Gandhi Sagar – Madhya Pradesh is correctly matched.
3. Indira Sagar – Andhra Pradesh: The Indira Sagar Dam and Reservoir are built on the Narmada River. This massive reservoir is located in the Khandwa district of the state of Madhya Pradesh. It is one of the largest reservoirs in India. Therefore, the pair Indira Sagar – Andhra Pradesh is not correctly matched.
4. Maithon – Chhattisgarh: The Maithon Dam and Reservoir are located on the Barakar River, a tributary of the Damodar River. This reservoir is situated in the Dhanbad district of the state of Jharkhand. It was built primarily for flood control. Therefore, the pair Maithon – Chhattisgarh is not correctly matched.

Summary of Correctness

Based on the verification above, we can summarize the correctness of each pair:

• Ghataprabha – Telangana: Incorrect Match
• Gandhi Sagar – Madhya Pradesh: Correct Match
• Indira Sagar – Andhra Pradesh: Incorrect Match
• Maithon – Chhattisgarh: Incorrect Match

Out of the four pairs provided, three pairs are not correctly matched.

Counting the Incorrectly Matched Pairs

We found the following pairs to be incorrectly matched:

1. Ghataprabha – Telangana
2. Indira Sagar – Andhra Pradesh
3. Maithon – Chhattisgarh

There are a total of three incorrectly matched pairs.

The question asks for the number of pairs that are not correctly matched. Our analysis shows that 3 pairs are not correctly matched.

Revision Table: Key Reservoirs and States

Additional Information on Indian Reservoirs

Reservoirs, often created by building dams, play a crucial role in water management in India. They serve multiple purposes, including irrigation, hydroelectric power generation, flood control, water supply for domestic and industrial use, and even recreation.

Understanding the location and purpose of major reservoirs is important for geography and general knowledge. The distribution of reservoirs is influenced by river systems, topography, and regional water needs.

Key aspects of reservoirs:

• Storage: They store large volumes of water, especially during monsoon seasons.
• Regulation: They help regulate river flow, preventing floods downstream and ensuring water availability during dry periods.
• Electricity Generation: Many dams associated with reservoirs have hydroelectric power plants.
• Irrigation: Water from reservoirs is channeled through canal networks to agricultural fields.

Major river valleys often feature a series of dams and reservoirs, forming integrated river valley projects. Examples include the Damodar Valley Corporation (DVC) project, which includes the Maithon Dam, and the Narmada Valley Project, which includes the Indira Sagar Dam.