Karst hydrology — A review

LeGrand, Harry E.; Stringfield, V. T.

doi:10.1016/0022-1694(73)90034-6

Cited by 38 publications

(14 citation statements)

References 13 publications

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“…These features result in an uneven distribution of permeability in karst systems and surface and subsurface hydrological conditions. Local high permeability at shallow depth in mature karst regions leads to an ecology associated with a soilless and water-scarce surface environment (LeGrand and Stringfield 1973;White 2002). Therefore, to investigate soil moisture dynamics may be helpful to better understand the hydrological and ecological processes in karst ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Soil moisture dynamics under different land uses on karst hillslope in northwest Guangxi, China

et al. 2010

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Temporal and spatial dynamics of soil moisture are little known on karst hillslope with shallow soil in subtropical region. The objectives of this paper were (1) to investigate the temporal dynamics of soil moisture at depth of 0-10 cm under different land uses; and (2) to understand the relationship between mean and coefficient of variation (CV) of moisture contents on karst hillslope in northwest Guangxi, China. Soil moisture contents had a moderate variation (CV 17.5-30.3%) over an 8-month period and they had a significant difference among different land uses at the 0.01 level with a decreasing order: native scrubland [ abandoned cropland and sloping cropland [ economic forestland. There were higher mean and lower CV of moisture contents in rainy season than those in drought season. Mean and CV of moisture contents had a significant negative linear relationship except in abandoned cropland with higher soil and vegetation heterogeneity. This suggested that spatial variability of soil moisture within sampling sites would decrease when soils were wet and increase when soils were arid. Compared with rainy season, more soil samples may be needed and the interval for sampling should be shortened in drought season. Such information provided some insights to better understand the dynamics and variability of soil moisture at a larger scale in karst region of southwest China.

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Section: Introductionmentioning

confidence: 99%

Soil moisture dynamics under different land uses on karst hillslope in northwest Guangxi, China

et al. 2010

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“…Karst aquifers are often reported as habitats recognizable by uneven flow/discharge rates (e.g., Legrand & Stringfield 1973;White 1988;Barberá & Andreo 2011;Zhang et al 2011). However, the variability of subterranean flow in karst aquifers is mostly related to the specific permeability features of the limestone and to the storage capacity of the epikarstic layer, whereas the surface water flow in karst aquifers, pronounced in our cascading lake hydrosystem, is likely more dependent on precipitation and runoff (Ford & Williams 2007).…”

Section: Discussionmentioning

confidence: 99%

Meiofauna constitute a considerable portion of invertebrate drift among moss-rich patches within a karst hydrosystem

Perić¹,

Dražina²,

Špoljar³

et al. 2014

Biologia

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Aiming to establish the most frequent invertebrate taxa in drift at the small spatial scale within a moss-rich karst tufa-precipitating hydrosystem, we sampled drift among microhabitats differing in substratum type and flow conditions along a tufa barrier-cascading lotic reach. Additionally, we addressed the question of the contribution and the potential significance of meiofauna within the overall invertebrate drift at the small spatial scale. During the study period, a total of 60 invertebrate taxa were recorded in the drift. Six of these taxa belonged to the annelid/arthropod meiofauna and they represented 35% of total drift density. Macroinvertebrates found in drift were represented mainly by larval insects. The composition of the most abundant taxa in total drift was as follows: Alona spp. (Cladocera 26.7%), Riolus spp. (Coleoptera: Elmidae 13.2%), Simulium spp. (Diptera: Simuliidae 12.2%), Enchytraeidae (Oligochaeta 10.4%), Hydrachnidia (6.3%), Orthocladinae (Diptera: Chironomidae 3.9%) and Naididae (Oligochaeta 3.6%). Faunal drift densities and amounts of transported particulate matter (PM) were highest at the fast-flowing sites located at the barriers and lowest at the slowflowing sites within pools. Similarly to the seasonal amounts of transported PM, faunal drift was lowest in winter, and peaked in autumn and in late spring/early summer. Correlation between flow velocity and PM-faunal drift densities suggested a significant effect of the dislodged PM, though a minor influence of discharge and flow velocity on faunal drift. We suggest that the small-scale habitat heterogeneity and the respective feeding and refugial strategies of the fauna, as well as faunal passive dislodgement initiated by the shear forces of the flow were the most important drivers of observed drift patterns.

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“…By adhering to the fundamental study framework of (a) structure, (b) process, and (c) stage, we excitedly produced several papers individually and collectively that have anchored educational value in carbonate hydrology studies. Our overall visits and observations of limestone terranes in the United States, the Caribbean region, Europe, Mexico, and Australia allowed us to prepare useful generalizations about karst regions that have worldwide application (Stringfield and LeGrand 1971; LeGrand and Stringfield 1971, 1973; LeGrand 1973).…”

Section: My Final Work With the Usgsmentioning

confidence: 99%

Autobiography of Harry E. LeGrand

LeGrand¹

2009

Groundwater

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Karst hydrology — A review

Cited by 38 publications

References 13 publications

Soil moisture dynamics under different land uses on karst hillslope in northwest Guangxi, China

Soil moisture dynamics under different land uses on karst hillslope in northwest Guangxi, China

Meiofauna constitute a considerable portion of invertebrate drift among moss-rich patches within a karst hydrosystem

Autobiography of Harry E. LeGrand

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