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Agro-hydrologic modelling for simulating soil moisture dynamics in the root zone of Potato based on crop coefficient approach under limited climatic data.
- Source :
- ISH Journal of Hydraulic Engineering; 2022Supplement, Vol. 28, p310-326, 17p
- Publication Year :
- 2022
-
Abstract
- Field lysimetric experiments were conducted on Potato crop grown in a humid sub-tropical agro-climate during 2014–2017 cropping seasons. Reference evapotranspiration (ET<subscript>0</subscript>) methods based on limited climatic data were evaluated with the FAO-56 Penman-Monteith (P-M) method. The performance of temperature-based and radiation-based methods was reliable, but evaporation-based methods performed poorly. The best methods in each category viz. Hargreaves-Samani, FAO-24 Radiation, and Snyder along with FAO-56 P-M were considered to estimate the empirical crop evapotranspiration (ET<subscript>c</subscript>) using the crop coefficient approach. The empirical ET<subscript>c</subscript> was compared with the field ET<subscript>c</subscript> obtained through water balance approach. A root water uptake-based numerical model was utilized to simulate the soil moisture dynamics in the crop root zone, wherein ET<subscript>c</subscript> is an important input parameter. The model simulated soil moisture was compared with the field observed values. Results indicate that FAO-56 P-M and Hargreaves-Samani-based simulated values presented close agreement with field observed values. FAO-24 Radiation and Snyder-based simulations underestimated and overestimated the field observed soil moisture, respectively. The field soil moisture depletion of 30% corresponds to simulated depletion of 15% (Snyder), 25% (Hargreaves-Samani), 28% (FAO-56 P-M) and 40% (FAO-24 Radiation). [ABSTRACT FROM AUTHOR]
- Subjects :
- SOIL moisture
POTATOES
EVAPOTRANSPIRATION
WATER balance (Hydrology)
IRRIGATION
Subjects
Details
- Language :
- English
- ISSN :
- 09715010
- Volume :
- 28
- Database :
- Complementary Index
- Journal :
- ISH Journal of Hydraulic Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 155002985
- Full Text :
- https://doi.org/10.1080/09715010.2020.1789510