A simple algorithm for estimation of water requirement of shallow-rooted landscape cover crops independent of lysimeters. Case study: Frankenia | ||
| تحقیقات آب و خاک ایران | ||
| Volume 55, Issue 5, August 2024, Pages 833-845 PDF (1.82 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22059/ijswr.2024.375034.669693 | ||
| Authors | ||
| Ahmad Pezeshk1; Seyed Mohammadreza Naghedifar2; Mahdi selahvarzi3; Alinaghi Ziaei* 2 | ||
| 1PhD Candidate of Irrigation and Drainage, Department of Water Science and Engineering, Ferdowsi University of Mashhad (FUM), Iran | ||
| 2Department Water Engineering, College Agriculture, Ferdowsi University, Mashhad, Iran | ||
| 3Water Science and Engineering Department, Agriculture Faculty, Ferdowsi University of Mashhad, Iran | ||
| Abstract | ||
| Cover plants, among the most commonly used plants in the realm of green spaces, are typically characterized by shallow roots. In this research, a simple and flexible algorithm has been introduced for calculating the basal crop coefficient and evaporation coefficient of shallow-rooted plants without the use of (micro-) lysimeters. The presented algorithm requires measurements of moisture at three depths for short-term calculations and only surface layer moisture monitoring for long-term calculations. Using this algorithm, it is possible to calculate the potential evaporation and transpiration of the plant. Furthermore, the presented algorithm is independent of time steps. To evaluate this algorithm, nine experimental plots were utilized, including six Frankenia plots with full coverage and three bare soil plots during the peak water demand period. All experiments were conducted at the educational site of irrigation systems in the vicinity of the meteorological site of Ferdowsi University of Mashhad (FUM). For this purpose, the water content and irrigation of these plots was fulfilled (at most) every 48 hr. The results indicated that the presented algorithm has good capabilities for estimating the basal crop and evaporation coefficients. Additionally, the basal crop coefficient for Frankenia plant was found to be 1, and the evaporation coefficient was 0.58. Therefore, this method can be employed for estimating the water requirements of different plants without using (micro-) lysimeters. | ||
| Keywords | ||
| Evapotranspiration; Crop coefficient; Irrigation; Landscape | ||
| References | ||
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