Analytical and numerical solutions for spacing between bi-level drains with evapotranspiration

Analytical and numerical solutions for bi-level drains

Authors

  • Ashutosh Upadhyaya ICAR Research complex for Eastern Region, Patna-800014, Bihar, India
  • Manisha Maheshkumar Kankarej Rochester Institute of Technology, Dubai, United Arab Emirates
  • Pawan Jeet ICAR Research Complex for Eastern Region, Patna – 800 014, Bihar, India

Abstract

In this study, the spatial and temporal variation of water table between two bi-level drains has been investigated through a numerical as well as analytic solution (AS) model.  Considering HFAS as benchmark solution, falling water tables obtained from FES followed by FIFDS were observed quite close to that obtained from HFAS and as per L2 and Tchebycheff norms computation, it was ranked at 1st and 2nd place, respectively. The AS predicted slower water table fall compared to HFAS. The water table fall is comparatively faster and spacing is more, when Boussinesq equation is solved employing HFAS.

Author Biographies

Ashutosh Upadhyaya, ICAR Research complex for Eastern Region, Patna-800014, Bihar, India

Head

Division of Land and Water Management 

Manisha Maheshkumar Kankarej, Rochester Institute of Technology, Dubai, United Arab Emirates

Professor 

Pawan Jeet, ICAR Research Complex for Eastern Region, Patna – 800 014, Bihar, India

Scientist 

Division of Land and Water Management 

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Published

2026-09-29

Issue

Vol. 28 No. 3 (2026): CIGR Journal

Section

I-Land and Water Engineering