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Computational Ecology and Software, 2016, 6(4): 139-149
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Article

Regional application of process based biogeochemical model DNDC in Godavari Sub-basin

A Biswal1, KK Choudhury1, P Venkat Raju2, MVR Sesha Sai1
1Agricultural Sciences Application Group, RSAA, National Remote Sensing Centre, Hyderabad 500037, India
2Water Resources Division , RSAA, National Remote Sensing Centre, Hyderabad 500037, India

Received 5 August 2016;Accepted 10 September 2016;Published 1 December 2016
IAEES

Abstract
The denitrification decomposition (DNDC) model is a process-based computer simulation model of soil carbon and nitrogen biogeochemistry. The DNDC model is one of the few process-based bio-geo chemical crop simulation models for which both a site-specific mode and a regional mode were developed. For regional mode, a region is presented in a typical Geographic Information System (GIS) consisting of many polygons or grid cells. The database consists of spatially differentiated information of location, climate, soil properties, cropping systems, and farm management practices for each polygon or grid cell for the entire modeled region. An attempt was made to establish the methodology for the estimation of soil greenhouse gas fluxes like CH4, CO2 and N2O on a sub-basin scale.

Keywords DNDC;GIS;Bio-geo chemical model;crop simulation.


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