Drainage, salt-leaching impacts, and the growth of Salicornia bigelovii irrigated with different saline waters

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dc.citation.volume289
dc.contributor.authorAl-Tamimi M
dc.contributor.authorGreen S
dc.contributor.authorDahr WA
dc.contributor.authorAl-Muaini A
dc.contributor.authorLyra D
dc.contributor.authorAmmar K
dc.contributor.authorDawoud M
dc.contributor.authorKenyon P
dc.contributor.authorKemp P
dc.contributor.authorKennedy L
dc.contributor.authorMcLachlan A
dc.contributor.authorClothier B
dc.date.accessioned2024-08-30T03:15:46Z
dc.date.available2024-08-30T03:15:46Z
dc.date.issued2023-09-14
dc.description.abstractWe sought to assess the impact on groundwater of using three types of saline waters to irrigate the halophyte Salicornia bigelovii Torrey in the hyper-arid United Arab Emirates. These were groundwater (GW) at 25 dS m−1, reverse-osmosis brine (RO) from a desalination unit at 40 dS m−1, and the aquabrine (AQ) effluent from land-based aquaculture in tanks filled with RO brine, also at 40 dS m−1. The three waters were applied through bubblers (BUB), pressure-compensated drippers (PCD), or subsurface irrigation tape (SUB). The yields of Salicornia fresh tips, harvest forage, and seed were greatest for AQ applied through BUB, being 650 g m−2. We found 2–2.6 kg m−2 for dry forage yield with AQ through BUB, compared with 1–2.3 kg m−2 for the other waters and emitter devices. The highest water productivities WPI (kg m−3) across all three crop-outputs came from Aquabrine applied by pressure-compensated drippers. We assessed the gross economic water productivity (GEWPI, $ m−3) based solely on gross revenue. The GEWPI was highest for AQ applied through PCD and SUB, namely 5.8–6.2 $ m−3. The value derives primarily from fresh tips. The GEWPl was well above the cost of desalination at $1.5 m−3. We measured drainage and leaching using fluxmeters. The greatest salt load to groundwater came from BUB, being 135–195 kg m−2. For PCD and SUB it was between 14 and 36 kg m−2. Mass-balance calculations of these salt loadings can predict the impact on the saline quality of aquifers. We used an exemplar loading of 75 kg m−2, and results in an annual salinity rise of 2.6 dS m−1 y−1 for an aquifer of saturated depth of 100 m. This significant rate of rise in the salinity of groundwater would represent a continuing deterioration in the utility of groundwater.
dc.description.confidentialfalse
dc.identifier.citationAl-Tamimi M, Green S, Dahr WA, Al-Muaini A, Lyra D, Ammar K, Dawoud M, Kenyon P, Kemp P, Kennedy L, McLachlan A, Clothier B. (2023). Drainage, salt-leaching impacts, and the growth of Salicornia bigelovii irrigated with different saline waters. Agricultural Water Management. 289.
dc.identifier.doi10.1016/j.agwat.2023.108512
dc.identifier.eissn1873-2283
dc.identifier.elements-typejournal-article
dc.identifier.issn0378-3774
dc.identifier.number108512
dc.identifier.piiS0378377423003773
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71402
dc.languageEnglish
dc.publisherElsevier B.V.
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S0378377423003773
dc.relation.isPartOfAgricultural Water Management
dc.rights(c) 2023 The Author/s
dc.rightsCC BY-NC 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectSaline groundwater
dc.subjectDesalination units
dc.subjectAquabrine
dc.subjectWater productivity
dc.subjectCrop growth
dc.subjectSalt-leaching impacts
dc.titleDrainage, salt-leaching impacts, and the growth of Salicornia bigelovii irrigated with different saline waters
dc.typeJournal article
pubs.elements-id480776
pubs.organisational-groupCollege of Health
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