کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6412583 1332898 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and initial evaluation of a portable in situ runoff and sediment monitoring device
ترجمه فارسی عنوان
طراحی و ارزیابی اولیه یک دستگاه نظارت بر رواناب و رسوب قابل حمل قابل حمل
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- An novel portable runoff and sediment monitoring device was developed.
- Runoff is fully mixed and subdivided twice before subsamples.
- Automatic flow-proportional sampling is based on collector mechanical power.
- The device was assessed by measuring field runoff and soil loss.
- The simulations showed good agreement with those in published literature.

SummaryAn inexpensive portable runoff and sediment monitoring device (RSMD) requiring no external electric power was developed for measuring water runoff and associated sediment loss from field plots ranging from 0.005 to 0.1 ha. The device consists of runoff gauge, sediment mixing and sectional subsampling assemblies. The runoff hydrograph is determined using a calibrated tipping bucket. The sediment mixing assembly minimizes fluid splash while mixing the runoff water/sediment mixture prior to subsampling this material. Automatic flow-proportional sampling utilizes mechanical power supplied by the tipping bucket action, with power transmitted to the sample collection assembly via the tipping bucket pivot bar. Runoff is well-mixed and subdivided twice before subsamples are collected for analysis. The resolution of this device for a 100 m2 plot is 0.025 mm of runoff; the device is able to capture maximum flow rates up to 82 mm h−1 in a plot of the same dimension. Calibration results indicated the maximum error is 2.1% for estimating flow rate and less than 10% for sediment concentration in most of the flow range. The RSMD was assessed by measuring field runoff and soil loss from different tillage and slope treatments for a single natural rainfall event. Results were in close agreement with those in published literature, giving additional evidence that this device is performing acceptably well. The RSMD is uniquely adapted for a wide range of field sites, especially for those without electric power, making it a useful tool for studying soil management strategies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 519, Part A, 27 November 2014, Pages 1141-1148
نویسندگان
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