Linking land based activities with ecosystem dynamics and nutrient management of the Pulicat Lagoon in India

The overall goal of this study will be to identify potential options for agricultural management surrounding Pulicat Lagoon to reduce greenhouse gas emission, nutrient loads and lessen future bloom events in the Lagoon. Considering the existing land use practices, multiple watershed models will be applied to examine the ability of a series of land management scenarios, developed in consultation with agricultural and environmental stakeholders, to reach the proposed targets. Additionally, existing agricultural practices (selective classes), soil mineralization and net N loss around the Lagoon will be assessed for prioritizing Crop Management to increase Nitrogen Use Efficiency (NUE) and restrict Cultural Eutrophication in Pulicat Lagoon. The study has been conceptualized in following objectives:

Identification of key geomorphological features and areas with anthropogenic activities, which may act/ influence nitrogen behavior in Pulicat

Assessment of decadal land use changes for assessing areas conversion which may have influenced nitrogen retention, release and losses

Quantification of land-based sources and sea-based sources of nitrogen

Assessment of nitrogen use efficiency for Pulicat lagoon.

Preparation of report card for Pulicat Lagoon