The dam's lakes

This question was previously asked in
BPSC AE Paper 4 (General Engineering Science) 10 Nov 2022 Official Paper
View all BPSC AE Papers >
  1. change markedly the local ecological conditions, vary the pressure applied to the land and groundwater level
  2. do not affect plant and animal life in the nearby region
  3. submerge very little area
  4. of hydroelectric plants are usually regarded as dirty and harmful

Answer (Detailed Solution Below)

Option 1 : change markedly the local ecological conditions, vary the pressure applied to the land and groundwater level
Free
BPSC AE General Studies Mock Test
4.1 K Users
20 Questions 40 Marks 25 Mins

Detailed Solution

Download Solution PDF

Explanation:

Ecological Impact:

  • Dams and their associated lakes (reservoirs) significantly alter the local ecological conditions. They create new water bodies where none existed, leading to changes in the natural habitats of plants and animals. Aquatic and terrestrial ecosystems are affected by the changes in water availability, temperature, and flow patterns. This can lead to the displacement of species that were previously adapted to the original environment, and in some cases, the introduction of invasive species that thrive in the new conditions.

Pressure on Land:

  • The accumulation of large volumes of water in a reservoir increases the pressure on the underlying land. This can cause geological changes such as land subsidence, seismic activity, or even induced earthquakes in some cases. The added weight from the water also changes the stress distribution within the Earth's crust.

Groundwater Levels:

  • Dams affect groundwater levels in several ways. The reservoir can recharge aquifers, raising the groundwater table. Conversely, changes in water flow downstream can reduce natural groundwater recharge, leading to a drop in groundwater levels. These changes can impact water availability for plants, animals, and human consumption.
Latest BPSC AE Updates

Last updated on Jun 13, 2025

-> BPSC AE 2025 exam date has been revised. The exam will be conducted on July 17, 18 & 19 now. 

-> Candidates who were facing technical issues while filling form can now fill the BPSC AE application form 2025 without any issue. 

->BPSC AE age limit 2025 has been revised.

->BPSC AE application form 2025  was released on April 30. The last date to fill BPSC AE form 2025 was May 28. 

->BPSC AE interview call letters released for Advt. 32/2024.

->BPSC AE notification 2025 has been released. 

->A total of 1024 vacancies are announced through BPSC AE recruitment 2025

->The BPSC Exam Calendar 2025 has been released for the Assistant Engineer Recruitment.

-> The selection will be based on a written exam and evaluation of work experience.

-> Candidates with a graduation in the concerned engineering stream are eligible for this post.

-> To prepare for the exam solve BPSC AE Previous Year Papers. Also, attempt the BPSC AE Civil  Mock Tests.

Get Free Access Now
Hot Links: teen patti master gold download teen patti neta teen patti pro