Write a short note on Eutrophication.

Question

Ghissu Editorial · Accepted Answer

Eutrophication is the nutrient enrichment of water bodies by fertiliser runoff, sewage and industrial effluents, causing excessive algal and plant growth that depletes oxygen and kills fish. It is controlled through balanced fertiliser use under the Soil Health Card scheme, better sewage treatment under AMRUT and wetland restoration.

**Introduction**

Eutrophication, driven by nutrient pollution from agriculture, sewage, and industry, severely impacts aquatic ecosystems and water quality in ==Andhra Pradesh==, threatening fisheries, biodiversity, and local livelihoods dependent on water resources.

**Institutional Framework and Capacity**

1. **Pollution Control Boards’ Role**: The Central and ==Andhra Pradesh Pollution Control Boards== actively monitor water quality under the National Water Quality Monitoring Programme⟦1⟧ (NWMP), identifying eutrophic water bodies and enforcing pollution norms to reduce nutrient loads from agriculture and sewage.  
2. **River Rejuvenation Committees**: The Central Monitoring Committee (CMC) and state-level River Rejuvenation Committees (RRCs) coordinate restoration efforts to reduce nutrient inflows causing eutrophication, focusing on rivers like Krishna and Godavari in ==Andhra Pradesh==.

**Challenges and Consequences**

1. **Agricultural Runoff**: Intensive fertiliser use in crops like chilli and horticulture in ==Andhra Pradesh== leads to nutrient leaching into rivers and reservoirs, accelerating eutrophication and harming aquatic life through oxygen depletion and fish kills.  
2. **Sewage Treatment Deficits**: Many sewage treatment plants operate below capacity or are outdated, resulting in untreated effluents entering water bodies and increasing nutrient pollution, especially in urban areas of ==Andhra Pradesh==.

**Strategies for Sustainable Management**

1. **Nutrient Management Policies**: The Soil Health Card Scheme and promotion of neem-coated urea help reduce excess fertiliser runoff in ==Andhra Pradesh== by encouraging balanced nutrient application and organic farming practices.  
2. **Infrastructure Upgrades**: Schemes like AMRUT and the National River Conservation Plan support modernising sewage treatment infrastructure to limit nutrient discharge and restore water quality in urban and peri-urban areas.

**Conclusion**

Combating eutrophication in ==Andhra Pradesh== requires integrated institutional efforts, sustainable agricultural practices, and improved wastewater management to safeguard aquatic ecosystems, fisheries, and livelihoods, aligning with Sustainable Development Goal 6 on clean water and sanitation.

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