Efficiency of the reformulated Gash's interception model in semiarid afforestations

Seyed Mohammad Moein Sadeghi, Pedram Attarod, John Toland Van Stan, Thomas Grant Pypker, David Llewellyn Dunkerley

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Interception loss (I) can remove substantial portions of water from forested watersheds. Thus, I prediction models are crucial if we are to balance human and ecosystem water needs under a shifting climate. This is particularly true for arid/semiarid regions that rely on afforestation efforts for economic or agricultural needs, yet very few of these regions have selected, applied and validated an I prediction model. This study applied/evaluated the reformulated Gash I model to a data set of 54 storms using 50 manual throughfall (TF) observations per site, for two stands of common afforestation tree species in semiarid Northern Iran: Pinus eldarica (Eldar pine) and Cupressus arizonica (Arizona cypress). The reformulated Gash model has rarely been evaluated in semiarid forest stands of these common species. Each species intercepted substantial rainfall during commonly experienced storm conditions-up to 56 (C. arizonica) and 65 (P. eldarica). Mean TF was modestly higher under C. arizonica (76 ) than P. eldarica (73 ). However, water storage (S) was nearly double for P. eldarica compared to C. arizonica (1.2-0.7mm, respectively). Canopy structural differences also altered the gap fraction (p) for P. eldarica (0.38) in relation to C. arizonica (0.49). Modeling error was low (-1.3 vs. -2.6 for P. eldarica and C. arizonica, respectively), generally underestimating I.
Original languageEnglish
Pages (from-to)76 - 85
Number of pages10
JournalAgricultural and Forest Meteorology
Volume201
DOIs
Publication statusPublished - 2015

Cite this

Sadeghi, Seyed Mohammad Moein ; Attarod, Pedram ; Van Stan, John Toland ; Pypker, Thomas Grant ; Dunkerley, David Llewellyn. / Efficiency of the reformulated Gash's interception model in semiarid afforestations. In: Agricultural and Forest Meteorology. 2015 ; Vol. 201. pp. 76 - 85.
@article{d74426f3843440fc9f830c6699e35e34,
title = "Efficiency of the reformulated Gash's interception model in semiarid afforestations",
abstract = "Interception loss (I) can remove substantial portions of water from forested watersheds. Thus, I prediction models are crucial if we are to balance human and ecosystem water needs under a shifting climate. This is particularly true for arid/semiarid regions that rely on afforestation efforts for economic or agricultural needs, yet very few of these regions have selected, applied and validated an I prediction model. This study applied/evaluated the reformulated Gash I model to a data set of 54 storms using 50 manual throughfall (TF) observations per site, for two stands of common afforestation tree species in semiarid Northern Iran: Pinus eldarica (Eldar pine) and Cupressus arizonica (Arizona cypress). The reformulated Gash model has rarely been evaluated in semiarid forest stands of these common species. Each species intercepted substantial rainfall during commonly experienced storm conditions-up to 56 (C. arizonica) and 65 (P. eldarica). Mean TF was modestly higher under C. arizonica (76 ) than P. eldarica (73 ). However, water storage (S) was nearly double for P. eldarica compared to C. arizonica (1.2-0.7mm, respectively). Canopy structural differences also altered the gap fraction (p) for P. eldarica (0.38) in relation to C. arizonica (0.49). Modeling error was low (-1.3 vs. -2.6 for P. eldarica and C. arizonica, respectively), generally underestimating I.",
author = "Sadeghi, {Seyed Mohammad Moein} and Pedram Attarod and {Van Stan}, {John Toland} and Pypker, {Thomas Grant} and Dunkerley, {David Llewellyn}",
year = "2015",
doi = "10.1016/j.agrformet.2014.10.006",
language = "English",
volume = "201",
pages = "76 -- 85",
journal = "Agricultural and Forest Meteorology",
issn = "0168-1923",
publisher = "Elsevier",

}

Efficiency of the reformulated Gash's interception model in semiarid afforestations. / Sadeghi, Seyed Mohammad Moein; Attarod, Pedram; Van Stan, John Toland; Pypker, Thomas Grant; Dunkerley, David Llewellyn.

In: Agricultural and Forest Meteorology, Vol. 201, 2015, p. 76 - 85.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Efficiency of the reformulated Gash's interception model in semiarid afforestations

AU - Sadeghi, Seyed Mohammad Moein

AU - Attarod, Pedram

AU - Van Stan, John Toland

AU - Pypker, Thomas Grant

AU - Dunkerley, David Llewellyn

PY - 2015

Y1 - 2015

N2 - Interception loss (I) can remove substantial portions of water from forested watersheds. Thus, I prediction models are crucial if we are to balance human and ecosystem water needs under a shifting climate. This is particularly true for arid/semiarid regions that rely on afforestation efforts for economic or agricultural needs, yet very few of these regions have selected, applied and validated an I prediction model. This study applied/evaluated the reformulated Gash I model to a data set of 54 storms using 50 manual throughfall (TF) observations per site, for two stands of common afforestation tree species in semiarid Northern Iran: Pinus eldarica (Eldar pine) and Cupressus arizonica (Arizona cypress). The reformulated Gash model has rarely been evaluated in semiarid forest stands of these common species. Each species intercepted substantial rainfall during commonly experienced storm conditions-up to 56 (C. arizonica) and 65 (P. eldarica). Mean TF was modestly higher under C. arizonica (76 ) than P. eldarica (73 ). However, water storage (S) was nearly double for P. eldarica compared to C. arizonica (1.2-0.7mm, respectively). Canopy structural differences also altered the gap fraction (p) for P. eldarica (0.38) in relation to C. arizonica (0.49). Modeling error was low (-1.3 vs. -2.6 for P. eldarica and C. arizonica, respectively), generally underestimating I.

AB - Interception loss (I) can remove substantial portions of water from forested watersheds. Thus, I prediction models are crucial if we are to balance human and ecosystem water needs under a shifting climate. This is particularly true for arid/semiarid regions that rely on afforestation efforts for economic or agricultural needs, yet very few of these regions have selected, applied and validated an I prediction model. This study applied/evaluated the reformulated Gash I model to a data set of 54 storms using 50 manual throughfall (TF) observations per site, for two stands of common afforestation tree species in semiarid Northern Iran: Pinus eldarica (Eldar pine) and Cupressus arizonica (Arizona cypress). The reformulated Gash model has rarely been evaluated in semiarid forest stands of these common species. Each species intercepted substantial rainfall during commonly experienced storm conditions-up to 56 (C. arizonica) and 65 (P. eldarica). Mean TF was modestly higher under C. arizonica (76 ) than P. eldarica (73 ). However, water storage (S) was nearly double for P. eldarica compared to C. arizonica (1.2-0.7mm, respectively). Canopy structural differences also altered the gap fraction (p) for P. eldarica (0.38) in relation to C. arizonica (0.49). Modeling error was low (-1.3 vs. -2.6 for P. eldarica and C. arizonica, respectively), generally underestimating I.

UR - http://www.sciencedirect.com/science/article/pii/S0168192314002573/pdfft?md5=c82ad0c98db6ddf52234c2a6a39b8925&pid=1-s2.0-S0168192314002573-main.pdf

U2 - 10.1016/j.agrformet.2014.10.006

DO - 10.1016/j.agrformet.2014.10.006

M3 - Article

VL - 201

SP - 76

EP - 85

JO - Agricultural and Forest Meteorology

JF - Agricultural and Forest Meteorology

SN - 0168-1923

ER -