Effects of controlled drainage on the hydrology of drained pine plantations in the North Carolina coastal plain

Amatya, Devendra M.; Skaggs, R. W.; Gregory, James D.

doi:10.1016/0022-1694(95)02905-2

Cited by 93 publications

(157 citation statements)

References 11 publications

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“…The watersheds are surrounded by forested land in the north, south, and west, and by agricultural land in the east. The boundary roads hydrologically separate the watersheds from influences of activities on neighboring lands, while raised beds (≈0.4 m) minimize surface flow between watersheds [26]. McCarthy et al [46] characterized the topography of the site as flat Coastal Plain with a gradient of 0.1% and ground surface at about 3 m above sea level.…”

Section: Site Descriptionmentioning

confidence: 99%

“…The P-M PET simulations are based on DRAINMOD-FOREST developed by [38]. For a detailed description of the site soil parameters, climatological data, and forest vegetation, the readers are referred elsewhere [26,38,46,47].…”

Section: Site Descriptionmentioning

confidence: 99%

“…A statistically significant relationship between the control and treatment watersheds is established during calibration period such that any significant shift detected in the relationship during treatment is attributed to the treatment effects. The approach has been extended to other fields of study to assess effectiveness of conser-vation practices [13][14][15]; agroforestry [16][17][18][19][20]; nitrogen and phosphorus management [21,22]; riparian restoration [23]; controlled drainage [24][25][26]; and land development [27].…”

Section: Introductionmentioning

confidence: 99%

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Consistency of Hydrologic Relationships of a Paired Watershed Approach

Ssegane¹,

Amatya²,

Chescheir³

et al. 2013

AJCC

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Paired watershed studies are used around the world to evaluate and quantify effects of forest and water management practices on hydrology and water quality. The basic concept uses two neighboring watersheds (one as a control and another as a treatment), which are concurrently monitored during calibration (pre-treatment) and post-treatment periods. A statistically significant relationship between the control and treatment watersheds is established during calibration period such that any significant shift detected in the relationship during treatment is attributed to the treatment effects. The approach assumes that there is a consistent, quantifiable, and predictable relationship between watershed response variables. This study tests the hypothesis that the hydrologic relationships between control and treatment watersheds for daily water table elevation (WTE) and daily flow data were similar without any statistically significant difference during two different calibration (1988-1989 and 2007-2008) and treatment periods (1995-1996 and 2009), when the control and treatment watersheds were interchanged. The watersheds are two artificially drained loblolly pine forests (D1: 24.7 ha and D2: 23.6 ha) located in coastal North Carolina. Results depicted significantly similar WTE regression relationships during the two calibration periods but significantly different WTE relationships during the two treatment periods with reversed control and treatment watersheds. Calibration and treatment flow relationships, and the mean treatment effects on WTE and flow, before and after treatment reversal were significantly different (α = 0.05). The study also discusses causes of differences in hydrologic relationships and treatment effects for such reversal of treatments during a 21-year span of the study on these two similar and adjacent watersheds. The observed differences in the hydrologic relationships between control and treatment watersheds before and after treatment reversal may be attributed to climate or hydrologic non-stationarity which may affect the reliability of paired watershed approach especially when the calibration periods are short.

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Section: Site Descriptionmentioning

confidence: 99%

Section: Site Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Consistency of Hydrologic Relationships of a Paired Watershed Approach

Ssegane¹,

Amatya²,

Chescheir³

et al. 2013

AJCC

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“…Storm runoff varies widely, from none to over 70 % of rainfall (Epps et al, 2013), which is believed to be related to soil water and depression storage. In low-gradient forested watersheds, we anticipate an even greater coupling of transpirative and soil water dynamics in runoff generation processes (Amatya et al, 1996;Slattery et al, 2006;Sun et al, 2010;Amatya and Skaggs, 2011;Dai et al, 2011;Skaggs et al, 2011;Tian et al, 2012). Using isotope effects of transpiration and evaporation from a global data set, Jasechko et al (2013) demonstrated that transpiration is the major component of the total evapotranspiration (ET) process in the global water cycle.…”

Section: Introductionmentioning

confidence: 99%

“…A simulation study on a low-gradient coastal forested watershed by Tian et al (2012) reported that canopy interception accounted for 16 % of ET. Amatya et al (1996) reported a value of 24 % while Sun et al (2010) reported an average interception loss of 15 % of incident precipitation -both studies were carried out in intensively managed pine plantations. In every case, the impact of interception and transpiration losses suggests the dominant effect of evapotranspiration on the hydrologic budget of forested watersheds.…”

Section: Introductionmentioning

confidence: 99%

Hurricane impacts on a pair of coastal forested watersheds: implications of selective hurricane damage to forest structure and streamflow dynamics

Jayakaran

Williams

Ssegane

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. Hurricanes are infrequent but influential disruptors of ecosystem processes in the southeastern Atlantic and Gulf coasts. Every southeastern forested wetland has the potential to be struck by a tropical cyclone. We examined the impact of Hurricane Hugo on two paired coastal South Carolina watersheds in terms of streamflow and vegetation dynamics, both before and after the hurricane's passage in 1989. The study objectives were to quantify the magnitude and timing of changes including a reversal in relative streamflow difference between two paired watersheds, and to examine the selective impacts of a hurricane on the vegetative composition of the forest. We related these impacts to their potential contribution to change watershed hydrology through altered evapotranspiration processes. Using over 30 years of monthly rainfall and streamflow data we showed that there was a significant transformation in the hydrologic character of the two watersheds -a transformation that occurred soon after the hurricane's passage. We linked the change in the rainfall-runoff relationship to a catastrophic change in forest vegetation due to selective hurricane damage. While both watersheds were located in the path of the hurricane, extant forest structure varied between the two watersheds as a function of experimental forest management techniques on the treatment watershed. We showed that the primary damage was to older pines, and to some extent larger hardwood trees. We believe that lowered vegetative water use impacted both watersheds with increased outflows on both watersheds due to loss of trees following hurricane impact. However, one watershed was able to recover to pre hurricane levels of evapotranspiration at a quicker rate due to the greater abundance of pine seedlings and saplings in that watershed.

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