22nd april 2025 Current Affairs
Cloudburst-Triggered Landslide in Jammu and Kashmir Syllabus: GS1/ Geography Context A recent cloudburst in Ramban tehsil, Jammu and Kashmir, triggered torrential rains, hailstorms, and strong winds, resulting in widespread damage and disruption across the region. What is a Cloudburst? A cloudburst is a localized extreme weather event characterized by intense rainfall over a short period, often resulting in flash floods. While more frequent in hilly regions, cloudbursts can also occur in plains. Definition: 10 cm or more rainfall in an hour over a 10 km x 10 km area 5 cm rainfall in 30 minutes over the same area also qualifies Mechanism of Cloudbursts: Cloudbursts are more common in mountainous terrains due to a process called orographic lift: Moist, warm air is forced to rise when it hits a mountain slope. As it ascends, the air expands and cools due to lower pressure. Cooling causes condensation, forming dense clouds and heavy rainfall. What is Orographic Rain? Orographic rain occurs when moist air is lifted over a mountain range: Air rises and cools. Moisture condenses to form clouds. Heavy rainfall occurs on the windward side. The leeward side remains dry — known as the rain shadow area. Impacts of Cloudbursts Flash Floods: Sudden inflow overwhelms rivers and drainage systems, especially in rocky, non-absorbent hilly regions.Example: 2013 Kedarnath disaster. Landslides: Triggered by saturated soil, leading to rapid downhill movement of rocks and debris. Loss of Life & Livelihood: Sudden onset leaves minimal time for evacuation; homes, crops, and livestock are often destroyed. Infrastructure Damage: Roads, bridges, electricity lines, and telecom networks are frequently washed away. Social Disruption: Leads to trauma, displacement, migration, and affects essential services like health and education in remote areas. Measures Taken in India: Disaster Management Act, 2005: Framework for disaster risk reduction at national and state levels. National Institute of Disaster Management (NIDM): Capacity building and training support. Early Warning Systems India Meteorological Department (IMD): Uses Ensemble Prediction Systems (EPS) for rainfall accuracy. Doppler Weather Radars (DWRs): Real-time detection of intense rainfall, especially in vulnerable zones. Flash Flood Guidance System (FFGS): Developed with WMO to issue early warnings across South Asia. Mobile Alert Systems: Real-time SMS and app notifications by IMD and NDMA. Way Forward: To reduce the devastating impact of cloudbursts, India must adopt a holistic, proactive strategy: Strict land-use planning and enforcement of zoning regulations in high-risk areas Resilient infrastructure, including: Efficient stormwater drainage Slope stabilization Rainwater harvesting systems Community-based preparedness and localized disaster response training Climate change adaptation must be mainstreamed into all disaster management strategies, as the frequency and intensity of extreme weather events continue to rise. Consider the following statements regarding disaster management in India: The Disaster Management Act, 2005 is applicable only to natural disasters. The National Institute of Disaster Management (NIDM) is responsible for disaster response and relief operations on the ground. The Act provides for the establishment of National and State Disaster Management Authorities. Which of the above statements is/are correct? A) 1 and 2 onlyB) 2 and 3 onlyC) 3 onlyD) 1, 2 and 3 Answer: C) 3 only Explanation: Statement 1 is incorrect: The Disaster Management Act, 2005 covers both natural and man-made disasters. Statement 2 is incorrect: The NIDM focuses on capacity building, research, and training, not direct response. Statement 3 is correct: The Act establishes the National Disaster Management Authority (NDMA) and State Disaster Management Authorities (SDMAs). ISRO Satellites Forecast Wheat Production: Use of Space Technology in Agriculture Sector Syllabus :GS 3/Economy The Indian Space Research Organisation (ISRO) has estimated India’s total wheat production for the 2024–25 Rabi season at 122.724 million tonnes, based on satellite data from eight major wheat-growing states. About the Study The study utilized the Comprehensive Remote Sensing Observation on Crop Progress (CROP) framework developed by NRSC/ISRO. CROP is a semi-automated and scalable tool that enables near real-time monitoring of crop sowing and harvesting, especially during the Rabi season. It integrates data from satellites like EOS-04, EOS-06, and Resourcesat-2A, using Optical and Synthetic Aperture Radar (SAR) datasets to assess wheat sowing patterns and crop health. As of March 31, 2025, the wheat-sown area stood at 330.8 lakh hectares, closely aligning with figures from the Ministry of Agriculture. The Role of Space Technology in Agriculture India’s agriculture is critical for food security and rural livelihoods, but faces challenges such as population pressure, resource constraints, and climate variability. Space-based technology offers sustainable, smart solutions to modernize and optimize agriculture. Benefits and Applications of Space Technology in Agriculture Precision Agriculture GNSS (Global Navigation Satellite Systems) allow accurate field mapping and resource allocation. Enables precise irrigation, fertilizer application, and crop scheduling, enhancing productivity and reducing waste. Remote Sensing & Satellite Imaging Tracks crop health, vegetation patterns, and land use changes. Detects early signs of disease for targeted pest control and reduced pesticide usage. Hyperspectral Imaging Provides high-resolution data for plant health diagnostics, identifying subtle physiological stress before visible symptoms appear. More accurate than conventional spectral sensors. Water & Soil Management Supports efficient irrigation, groundwater conservation, and soil moisture monitoring. Helps manage erosion, land degradation, and promotes soil conservation practices. Improved Connectivity Satellite-based networks enhance real-time access to: Weather forecasts Market prices Expert agronomic advice Key Government Initiatives The Ministry of Agriculture and Farmers Welfare has integrated space technology in agriculture since the 1980s. Mahalanobis National Crop Forecast Centre (MNCFC), established in 2012, operationalizes space-based crop forecasting tools. Soil and Land Use Survey of India (SLUSI) uses satellite data for soil resource mapping. Krishi-DSS: A first-of-its-kind geospatial platform providing: Satellite imagery Weather data Groundwater and soil health information Reservoir storage insights Conclusion and Way Forward Space technology holds transformative potential for India’s agricultural sector. By leveraging satellite data, geospatial tools, and AI-driven insights, agriculture can become: More productive Resource-efficient Sustainable and climate-resilient Its increased adoption will be crucial for ensuring food security, economic growth, and environmental sustainability in the years ahead. With reference to the Comprehensive Remote Sensing Observation on