کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4579166 1630094 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Salt mobilisation processes from a salinised catchment featuring a perennial stream
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Salt mobilisation processes from a salinised catchment featuring a perennial stream
چکیده انگلیسی

SummaryStream salinity is a major concern in the Murray-Darling Basin (MDB) for its impact upon irrigation, urban water supplies and biota. This study investigated the source of salt to a perennial stream in a small salt affected catchment in the eastern MDB. Using a Bayesian mixing model on an event basis, it was found that between one third and two thirds of the salt came from the near surface zone (0–0.2 m) and the remainder came from groundwater. For the year 2006, 38% of the salt exported from the catchment was sourced from the near surface zone. The source of water for the near surface zone comprises less than 1% of the catchment area and is associated with a saline seep/scald. This area becomes saturated during the winter months when saturated overland flow is generated. This mechanism for salt delivery to a stream is not explicitly included in most models used to generate management scenarios for the mitigation of stream salinity. There is a growing body of evidence to suggest that the near surface zone is very important for salt delivery to streams, therefore models should explicitly incorporate this mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 362, Issues 3–4, 5 December 2008, Pages 308–319
نویسندگان
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