Four seabed backscatter image classification methods that differ substantially in their approach are compared, using a dataset from Sydney Harbour. The first method is based on GeoAcoustic’s commercial GeoTexture software. GeoTexture relies on the user to extract features from the image to train the system to recognize textures based on a statistical method, before classifying the entire image....

Septic systems can be a potential source of phosphorus (P) in groundwater and contribute to eutrophication in aquatic systems. Our objective was to investigate P transport from two conventional septic systems (drip dispersal and gravel trench) to shallow groundwater. Two new in-situ drainfields (6.1 m long by 0.61 m wide) with a 3.72 m2 infiltrative surface were constructed. The drip dispersal ...

RNF8 links nucleosomal and cytoskeletal ubiquitylation of higher order protein structures Comment on: Chahwan R, et al. Cell Cycle 2013; 12:1000–8; PMID:23442799; http://dx.doi.org/10.4161/cc.23947 Richard Chahwan,* Serge Gravel, Takahiro Matsusaka and Stephen P. Jackson*; The Gurdon Institute; University of Cambridge; Cambridge, UK; Department of Zoology; University of Cambridge; Cambridge, UK...

How to make relevant decisions to preserve the quality of the hydrosystem and human wellbeing? This work assists in answering this question at a local level. A negotiation support simulator for a regional project is proposed which includes the numerous actors involved in water resource management projects. This simulator combines negotiation support tools and role-playing game for gravel extrac...

Granulometric, mineralogical and morphological investigation of the sea-bottom sediments in the Grgur Channel has revealed fi ve sediment types, the most frequent of which are muds containing some amount of coarse fractions (sand and gravel). The coarsest fractions are predominantly composed of recent shell fragments. Unexpected well rounded carbonate gravel was found SE of Prvić Island in 83 m...

Analysis of frozen cores of chum salmon egg pockets collected in the fall revealed that spawning activity purged about 75% of the fine sediments Corn the stream bed. The egg pocket was one of four distinct vertical strata detected in the cores. There was an undisturbed layer below the egg pocket and cover and bridge strata above the egg pocket, defined by their particle size distributions. Howe...

Bankfull discharge was identified in some 30 gravel-bed rivers representing in total c. 40 gauging stations. The catchment sizes vary from 4km2 to nearly 2700km2. Bankfull discharge value increases with basin size. In the case of gravel-bed rivers developed on an impermeable substratum, the following equation emerges: Qb=0·087 A 1·044. Bankfull discharge recurrence interval was determined by fi...

Geomorphic and hydraulic processes, which form gravel bars in large lowland rivers, have distinctive characteristics that control the magnitude and spatial patterns of infiltration and exfiltration between rivers and their immediate subsurface environments. We present a bedform-infiltration relation together with a set of field measurements along two reaches of the San Joaquin River, CA to illu...