Study the local or nearby dam and write down the environmental issues concerning the dam and the locality. – Maharashtra State Board Class 12 Environmental Studies (EVS) project topic and guidance.
Fetching document, please wait.
Project 22 : Study the local or nearby dam and write down the environmental issues concerning the dam and the locality. is an officially approved project topic in the Maharashtra State Board Class 12 Environmental Studies and Water Security curriculum. This comprehensive study equips students with practical field methodologies, ecological analysis, and empirical data required for securing an 'A' grade in school/junior college internal assessments.
Environmental Education and Water Security emphasizes sustainable development through scientific investigation. The practical documentation provided below covers the core findings, observations, and policy measures needed for comprehensive academic evaluation.
Aim of the Study: To visit a major local dam (e.g., Khadakwasla, Koyna, Bhatsa, Jayakwadi, or Radhanagari), investigate its engineering specifications, evaluate ecological disruptions, and assess downstream river health.
Field visit to a major dam in Maharashtra, reviewing Water Resources Department (WRD) dam safety bulletins, interviewing local farmers, fishermen, and displaced Project-Affected Persons (PAP), and assessing river flow below the dam wall.
This scientific investigation conforms strictly to Maharashtra State Board practical guidelines, incorporating primary survey data, empirical observations, and practical field documentation.
The following empirical observation matrix demonstrates standard data collection parameters, field measurements, and recorded outcomes for this project study:
| Environmental Domain | Engineering / Baseline Status | Observed Ecological Impact | Recommended Mitigation Strategy |
|---|---|---|---|
| Catchment Area & Siltation | 1,200 sq. km catchment; 850 MCM storage | Severe topsoil siltation has reduced dam storage capacity by 14%. | Execute intensive Catchment Area Treatment (CAT) with contour bunding and native afforestation. |
| Downstream River Hydrology | 100% water impounded during dry months | River downstream dries into stagnant pools; extinction of native Mahseer fish. | Mandate release of minimum 15% Environmental Flows (E-flows) year-round to sustain river life. |
| Forest & Wildlife Submergence | 4,200 hectares of forest submerged | Severe fragmentation of leopard and tiger migratory wildlife corridors. | Establish compensatory wildlife corridors and declare contiguous buffer zones as sanctuaries. |
| Displaced Communities (PAPs) | 14 villages relocated (1,800 families) | Loss of community cohesion, poor water facilities at rehabilitation colonies. | Ensure prompt fertile land-for-land rehabilitation and lifelong livelihood training. |
| Waterlogging & Soil Salinity | Excessive canal irrigation in black soils | Over-irrigation in downstream command area caused high soil salinization. | Promote compulsory micro-drip irrigation and subsurface drainage systems in command area. |
The field study and investigation of Project 22 focuses on the following key environmental observations and highlights:
A comprehensive analysis of Project 22 reveals crucial insights regarding dams & river ecology and local ecological resilience. By examining empirical data collected in the field, students understand the direct impact of human activity on ecosystems and learn practical conservation strategies applicable to Maharashtra's local environment.
Large dams provide vital irrigation food security and clean hydroelectric energy, but they permanently alter river hydrology. Balancing dam operations with compulsory environmental flows, catchment afforestation, and humane tribal rehabilitation is essential to reconcile development with ecological justice.
To secure full marks (30/30) in your internal project evaluation, structure your handwritten project file in the following official order:
The quantity, timing, and quality of freshwater flows required to sustain freshwater ecosystems, human livelihoods, and well-being downstream of a dam.
Soil and water conservation measures (afforestation, contour trenching, check dams) undertaken upstream of a dam to prevent topsoil erosion and reservoir siltation.
The 1967 Koyna earthquake (Magnitude 6.3) is one of the world most famous examples of Reservoir-Induced Seismicity (RIS) triggered by the weight of water in a deep reservoir.
The high concrete dam wall acts as an impassable physical barrier that blocks fish from swimming upstream to their natural spawning and breeding gravel beds.
Dead storage is the permanent water volume below the lowest outlet sill designed to hold sediment; Live storage is the usable water volume above it used for irrigation and drinking.