Phenomenological models of hydrologic processes in south Florida

Chin, David A.

doi:10.1016/j.jhydrol.2007.11.003

Cited by 13 publications

(18 citation statements)

References 18 publications

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“…The differential growth obtained depending on branch orientation agrees with recent measurements on Q. ilex trees, which show surprisingly that the canopy radius was higher on the south and west sides of the trunk than on the east and north sides, irrespective of the site aspect (Montero et al 2008). It would have been interesting in the present study to analyze represen- (Chin 2008) tative fine root samples before and during several years after the treatments, and to correlate the obtained values with the values of shoot growth. Injection treatments had no beneficial effect on trees initially scored as 3 (Fig.…”

Section: Discussionsupporting

confidence: 89%

“…We showed for the first time soil infiltration data on declined Q. ilex stands. Rawls et al (1993) provided generalized estimates of f 0 varying from 21 to 90 cm h −1 for US soils ranging from fine sandy clay to standard turfed agricultural soil, and Chin (2008) provided values of f 0 up to 127 cm h −1 for loamy sand soils of Florida. The f 0 value obtained for site 2 (145 cm h −1 ), probably as a consequence of the high gravel content, indicates the high capacity of infiltration of some of the soils in which Q. ilex trees grow.…”

Section: Discussionmentioning

confidence: 99%

“…Each test lasted approximately 2-3 h. Before testing, the average water contents (gravimetric measurement, 0-10 cm depth) of soils at sites 1, 2 and 3 were 12.2%, 13.6% and 9.2%, respectively. The most widely used empirical model to describe infiltration is the Horton model given by (Chin 2008), where f p is the infiltration rate under ponded conditions, also called the infiltration capacity; f 0 is the initial (maximum) infiltration capacity; f c is the asymptotic (minimum) infiltration capacity (t→∞); and k is the decay constant.…”

Section: Soil Infiltration Measurementsmentioning

confidence: 99%

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Evaluating potassium phosphonate injections for the control of Quercus ilex decline in SW Spain: implications of low soil contamination by Phytophthora cinnamomi and low soil water content on the effectiveness of treatments

et al. 2009

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The Iberian forests are suffering severe disease and mortality as a result of decline, with Quercus ilex the major species at risk. Trunk injections with potassium phosphonate, which have been used successfully to control Phytophthora cinnamomi, were tested against decline. In an area in which P. cinnamomi was isolated, Q. ilex trees showing different degrees of decline were trunkinjected. Soil properties, and measurements of soil water content (θ) and depth to soil water table were assessed at three sites with markedly different decline incidences. Over the 5 years following the initiation of the experiment, mean symptoms among springtreated trees and autumn-treated trees, or among trees injected twice a year (spring and autumn), once a year, and non-injected, were not significantly different. No effects of the treatments on shoot growth and acorn production were observed. However, θ values under trees which recovered from decline were higher than θ values under trees which did not recover from decline. At the site with the highest incidence of decline and tree mortality, P. cinnamomi was rarely isolated, and the presence of gravel, soil infiltration capacities and water table depth values were significantly higher than at the other sites, water stress being more likely to contribute to decline than P. cinnamomi. In areas in which θ is low, the distribution of phosphonate on the tree would be limited. Since the thresholds for phytotoxicity of potassium phosphonate in Q. ilex trees at the site studied would be higher than the amounts used, rates of the chemical slightly less than those that cause phytotoxicity should be tested.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Soil Infiltration Measurementsmentioning

confidence: 99%

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Evaluating potassium phosphonate injections for the control of Quercus ilex decline in SW Spain: implications of low soil contamination by Phytophthora cinnamomi and low soil water content on the effectiveness of treatments

et al. 2009

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“…With an average annual mean temperature of 25° C, southern Florida's climate is classified as maritime subtropical, with long, hot summers (typically May through November) and mild, dry winters (approximately December through April) [45,46]. Annually, Florida receives 140 cm of rainfall [47].…”

Section: Study Areamentioning

confidence: 99%

Efficient Wetland Surface Water Detection and Monitoring via Landsat: Comparison with in situ Data from the Everglades Depth Estimation Network

2015

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The U.S. Geological Survey is developing new Landsat science products. One, named Dynamic Surface Water Extent (DSWE), is focused on the representation of ground surface inundation as detected in cloud-/shadow-/snow-free pixels for scenes collected over the U.S. and its territories. Characterization of DSWE uncertainty to facilitate its appropriate use in science and resource management is a primary objective. A unique evaluation dataset developed from data made publicly available through the Everglades Depth Estimation Network (EDEN) was used to evaluate one candidate DSWE algorithm that is relatively simple, requires no scene-based calibration data, and is intended to detect inundation in the presence of marshland vegetation. A conceptual model of expected algorithm performance in vegetated wetland environments was postulated, tested and revised. Agreement scores were calculated at the level of scenes and vegetation communities, vegetation index classes, water depths, and individual EDEN gage sites for a variety of temporal aggregations. Landsat Archive cloud cover attribution errors were documented. Cloud cover had some effect on model performance. Error rates increased with vegetation cover. Relatively low error rates for locations of little/no vegetation were unexpectedly dominated by omission errors due to variable substrates and mixed pixel effects. Examined discrepancies between satellite and in situ modeled inundation demonstrated the utility of such comparisons for EDEN database improvement. Importantly, there seems no trend or bias in candidate algorithm performance as a function of time or general hydrologic conditions, an important finding for long-term monitoring. The developed database and knowledge gained from this analysis will be used for improved evaluation of candidate DSWE algorithms as well as other measurements made on Everglades surface inundation, surface water heights and vegetation using radar, lidar and hyperspectral instruments. Although no other sites have such an OPEN ACCESSRemote Sens. 2015, 7 12504 extensive in situ network or long-term records, the broader applicability of this and other candidate DSWE algorithms is being evaluated in other wetlands using this work as a guide. Continued interaction among DSWE producers and potential users will help determine whether the measured accuracies are adequate for practical utility in resource management.

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“…In the laboratory, a total of three experiments on four Miami Limestone samples measuring 0.205 m by 0.102 m by 0.102 m (ML-1 through ML-4) were completed to: (1) investigate the changes in EM wave velocity under the range of possible volumetric water content conditions which are typically between 16.9% and 25.6% from previous studies in the Miami Limestone (Barquin-Valle et al, 2011); (2) determine the critical saturation point or irreducible water saturation, which is the point where water is no longer retained in the pore space by capillarity, (to our knowledge unreported for the Miami Limestone); and (3) determine the height of capillary rise (considered negligible from previous studies, (Chin, 2008). Although the approach was not undertaken systematically in a larger variety of Miami Limestone samples, a set of four samples with a range of total porosity between 45.2% and 50.2% (consisting of mesoporosity (2-50 nm pores) and macroporosity (50 nm and larger pores)) as determined in a previous study by Mount and Comas (2014), were considered as representative of average porosity values found within Miami Limestone which range from 43.2% to 45.0% based on average values from Halley and Evans (1983) and Hester and Schmoker (1985).…”

Section: Laboratory Scalementioning

confidence: 99%

Delineation of macroporous zones in the unsaturated portion of the Miami Limestone using ground penetrating radar, Miami Dade County, Florida

Mount

Comas

Wright

et al. 2015

Journal of Hydrology

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Phenomenological models of hydrologic processes in south Florida

Cited by 13 publications

References 18 publications

Evaluating potassium phosphonate injections for the control of Quercus ilex decline in SW Spain: implications of low soil contamination by Phytophthora cinnamomi and low soil water content on the effectiveness of treatments

Evaluating potassium phosphonate injections for the control of Quercus ilex decline in SW Spain: implications of low soil contamination by Phytophthora cinnamomi and low soil water content on the effectiveness of treatments

Efficient Wetland Surface Water Detection and Monitoring via Landsat: Comparison with in situ Data from the Everglades Depth Estimation Network

Delineation of macroporous zones in the unsaturated portion of the Miami Limestone using ground penetrating radar, Miami Dade County, Florida

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