Skip to main content

The Detection of Annual Hypoxia in a Low Latitude Freshwater Reservoir in Kerala, India, Using the Small AUV Maya

Buy Article:

$20.00 plus tax (Refund Policy)


The Idukki Reservoir at an altitude of 748 m covering an area of 53 km2 is surrounded by tropical forests in the Western Ghats in the southwestern Indian state of Kerala. We used the small autonomous underwater vehicle (AUV) Maya with onboard sensors of dissolved oxygen, chlorophyll, turbidity, temperature, and depth to monitor the water quality environment of the Idukki Reservoir in May 2006. The use of AUVs in confined spaces like small lakes and reservoirs is new and uncommon, requiring extra safety to be implemented. As this is a prototype AUV, we shall describe in brief key aspects of the vehicle attributes, namely, its novel mechanical design, the autopilots that control the heading and cruising depth, and the safety and endurance of the platform. The data acquired by Maya revealed an acute oxygen deficiency at 21 m, a mid-water low turbidity layer between 10 m and 15 m, and a prominent chlorophyll maximum in the thermocline region of Idukki waters at 6 m. These experiments were repeated a year later in May 2007 and were in unambiguous agreement with the 2006 findings of hypoxia. These are the first observations of hypoxic processes using a small AUV in any Indian lake. The relevance of these results in freshwater systems shows similarities to hypoxia in saline coastal waters of the west coast of India and is discussed briefly.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Autonomous Vehicles; Dissolved oxygen; Eutrophication; Freshwater lakes; Hypoxia

Document Type: Research Article

Publication date: 2009-06-01

More about this publication?
  • The Marine Technology Society Journal is the flagship publication of the Marine Technology Society. It publishes the highest caliber, peer-reviewed papers on subjects of interest to the society: marine technology, ocean science, marine policy and education. The Journal is dedicated to publishing timely special issues on emerging ocean community concerns while also showcasing general interest and student-authored works.
  • Editorial Board
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more