@article{fdi:010085348,
  title = {{T}he anatomy of a channel-fed 'a'a lava flow system},
  author = {{H}arris, {A}. {J}. {L}. and {R}owland, {S}. {K}. and {C}hevrel, {M}agdalena {O}ryaelle},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he stabilized channel is a crucial element of an 'a'a flow system, delivering lava to forward extending zones of dispersed flow. {H}owever, the term stable implies that channel geometries, lava properties, and dynamics are invariable. {H}owever, just how stable are these in space and time? {T}o answer this question, we constrain the degree of variation for an extremely well-exposed stabilized channel on {K}ilauea ({H}awai'i), carrying out mapping, facies analyses, and sampling down the entire 5.5-km length of the channel-levee unit. {T}hough active for only 3 days, flow and emplacement dynamics were highly unstable, experiencing both temporal and spatial variation. {T}his resulted in a complex construction history and solidified channel form, where construction comprised three emplacement phases: initial, free-flowing, and late-stage ponded. {T}hese three emplacement phases were coupled with variation in underlying substrate, slope, and volume flux. {T}hese temporally and spatially varying conditions combined to result in four channel types and geometries (tubed, stable, ponded, and braided); five lava facies (smooth pahoehoe, rough/spiney, slabby, transitional, and 'a'a); and four levee types (initial-rubble, surge-fed overflow, pond-fed overflow, and accretionary). {C}omplexity in channel form was reflected in cooling rates that ranged from 6.6 degrees {C} km(-1) for free-flowing conditions to 17.7 degrees {C} km(-1) for ponded lava. {L}ikewise, vesicularities ranged from gas-rich (as high as 74% vesicles) to outgassed (as low as 27%). {D}ue to the high degree of variance at this system, we suggest that feeder channel is a better term for this component of a channel-fed 'a'a lava flow field. {T}his term stresses the role of the channel in feeding zones of dispersed flow and is not a term that implies channel form and flow dynamics are unchanging. {A}lthough flow conditions can be complex, flow for some periods can be stable. {I}f depths, widths, temperatures, and crystallinities during phases of below-bank stability can be identified, then the system can be modelled. {W}e show this by fitting down-channel variation in flow properties for stable periods to output of the {FLOWGO} thermorheological model. {I}n doing this, we provide a dataset that can guide and benchmark models aimed at simulating the dynamics and properties of channel-fed systems.},
  keywords = {{L}ava channel ; {L}evees ; {V}esicularity ; {C}ooling rate ; {C}rystallization rate ; {M}auna {U}lu ; {K}ilauea ; {B}enchmark ; {ETATS} {UNIS} ; {HAWAII} ; {KILAUEA} {VOLCAN} ; {MAUNA} {ULU}},
  booktitle = {},
  journal = {{B}ulletin of {V}olcanology},
  volume = {84},
  numero = {7},
  pages = {70 [34 ]},
  ISSN = {0258-8900},
  year = {2022},
  DOI = {10.1007/s00445-022-01578-0},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085348},
}