Chaubey, associate professor in the agricultural and biological engineering department and earth and atmospheric sciences department at Purdue University, has developed a multidisciplinary and multi-institutional soil and water research program in the area of nonpoint source pollution and watershed modeling that has enabled numerous state and federal agencies to effectively address complex water quality problems at local, regional and state levels. 

He provided leadership in developing the Eucha-Spavinaw Phosphorus Index, which has been instrumental in maintaining the agricultural viability in Arkansas and Oklahoma while maintaining greater environmental quality. His efforts in developing a decision-support system for watershed/water quality management, supported by a number of state and federal agencies, is being used for evaluating the impact of watershed management decisions and agricultural production and water quality, and to address trans-boundary water quality problems in watersheds shared by neighboring states. 

Chaubey has integrated his research and learning with the development and teaching of various graduate and under-graduate courses, and as an advisor and graduate advisor. He is authored or coauthored more than 180 refereed journal articles, book chapters, conference proceedings, technical papers and reports. He is often requested to present his research findings at international conferences and meetings. 

Awards and honors include a Gamma Sigma Delta Faculty Research Award of Merit; University of Arkansas BAE Outstanding Researcher award and Biological Engineering Student Club Best Teacher Award; Oklahoma State University Physical Science and Technology Group Graduate Research Excellence award; Oklahoma State University Phoenix award; ASABE Paper award; and Arkansas section Outstanding Agricultural Engineer honor. 

A 12-year member of ASABE, Chaubey has contributed his expertise to various Soil and Water division committees and is currently serving as chair of the SW-21 Hydrology group. He played a leadership role in the revitalization of the Arkansas section. Other professional memberships include the American Water Resources Association, and American Society of Engineering Education, and American Association for Advancement of Science. He is a member of two honorary societies.