Another Wayanad in making? A Karnataka village’s residents fear environmental fallout from laterite mining

Another Wayanad in making? A Karnataka village’s residents fear environmental fallout from laterite mining

Sub: Geo

Sec: Indian Physical Geo 

Context:

• Kallamundkuru village in Karnataka’s Dakshina Kannada district has become a centre of controversy due to large-scale laterite soil mining. This sudden increase in mining activity has raised concerns among environmental activists and locals about its impact on the area’s ecology and people’s livelihoods.

Details:

• Location and Mining Details:
  • Kallamundkuru village is in Moodabidri taluk, Dakshina Kannada district, Karnataka.
  • The laterite layer is at least 30 meters thick, with water-rich loose soil underneath.
• Environmental Concerns:
  • The area receives over 400 millimetres of rain annually, with heavy rainfall in July and August.
  • Environmentalists worry about soil degradation, water resource depletion, erosion, loss of biodiversity, and disruption of natural water flow.
  • There are fears of a disaster similar to recent events in Wayanad, Kerala.
  • There are demands for sustainable mining guidelines, including proper land restoration and ongoing environmental monitoring.

Laterite soils in India:

• Laterite soil is a type of soil found in tropical and subtropical regions.
• Formation:
  • Laterite soil forms in hot, wet climates through a process called lateralization.
  • It’s the result of intense weathering and leaching of parent rock material.
• Composition:
  • Rich in iron and aluminium oxides
  • Low in silica content
  • Often contains minerals like kaolinite, goethite, and gibbsite
• Characteristics:
  • Typically reddish or reddish-brown in color due to high iron oxide content
  • Can harden significantly when exposed to air and sun
  • Generally poor in nutrients for plant growth
  • Often has a high clay content
• Distribution:
  • Found in tropical and subtropical regions of Africa, South America, and Southeast Asia
  • In India, it’s common in states like Karnataka, Kerala, Goa, Tamil Nadu, Madhya Pradesh, Andhra Pradesh and the hilly areas of Odisha and Assam
• Uses:
  • Construction material (when cut into blocks and dried)
  • Road construction
  • As a source of aluminium and other minerals in some cases
• Agricultural implications:
  • Generally considered poor for agriculture due to low fertility
  • Requires careful management and fertilization for productive farming
• Environmental concerns:
  • Mining of laterite can lead to environmental issues like erosion and habitat destruction
  • Removal of laterite can affect local hydrology and soil stability
• Scientific importance:
  • Studied for insights into long-term climate changes and geological processes

Source: DTE