NDLI: Modelling of wetting pattern under trickle source in sandy soil of Nirjuli, Arunachal Pradesh (India)

Content Provider	Springer Nature Link
Author	Dabral, P. P. Pandey, P. K. Pandey, Ashish Singh, K. P. Singh, M. Sanjoy
Copyright Year	2011
Abstract	Wetting pattern can be obtained by either direct measurement of soil wetting in field, which is site specific, or by simulation using some models. Use of numerical or analytical flow models for design purpose is considered cumbersome and impractical in many situations. Therefore, present study was undertaken to develop a model for wetting pattern under trickle source in sandy soil of Nirjuli, Arunachal Pradesh. In the present study, the drip irrigation system was operated to record observed wetting front advance (vertical and horizontal) of emitters with flow rates of 2, 4 and 10 l h−1. A fixed quantity of 4 l of water was applied to the bare dry soil kept in a container of perspex sheet (1 m × 1 m × 0.9 m). The wetting front advance was observed just after irrigation and its subsequent redistribution after 1, 2, 4, 6, 9, 12, 15, 18, 24 and 48 h respectively after irrigation. Using Buckingham π theorem, a semi-empirical model was developed to simulate the wetting front pattern under trickle point source at the end of irrigation. Performance of the model just after irrigation was evaluated by comparing estimated values against observed values using F test, t test, ME and RMSE values. The redistribution of the wetting front geometry with respect to elapsed time was modelled with regression analysis using four models viz. linear, logarithmic, exponential and power. Power function was found to be the best fit for horizontal wetting front (W) as well as vertical wetting front advance (Z) based on the highest R 2 value.
Starting Page	287
Ending Page	292
Page Count	6
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	30
Issue Number	4
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-03-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environment Climate Change Sustainable Development Agriculture Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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