The Clean Water Act mandates that the chemical, physical, and biological integrity of our nation's waters be maintained and restored. Physical integrity has often been defined as physical habitat integrity, and as such, data collected during biological monitoring programs focus primarily on habitat quality. However, we argue that channel stability is a more appropriate measure of physical integ...

Surveys of wood along 30 forested headwater stream reaches in La Selva Biological Station in north-eastern Costa Rica represent the first systematic data reported on wood loads in neotropical streams. For streams with drainage areas of 0·1–8·5 km and gradients of 0·2–8%, wood load ranged from 3 to 34·7 m wood/100 m channel and 41–612 m wood/ha channel. These values are within the range reported...

Using longitudinal control lines and sparse measured cross sections with large spaces, a new method for quickly reconstructing digital terrains in natural riverways is presented. The riverway, mainly including the river boundaries, thalweg, dividing of floodplains main channel, water edges, can be obtained by interpreting satellite images, remote sensing images or site surveys. Then, are introd...

Hard river engineering or channelization alters channel bathymetry and morphology invites multiple fluvio-hydrological hazards. The linear (72 m), concrete, low height (1.6 multipillars (20 pillars) bridge with concrete embankments revetments has been constructed across along the Bala within Himalayan foothill zone in year 2017. As a result, rate of siltation tremendously increased at vicinity ...

In this paper, for the first time, effect of longitudinal profile shape rill (uniform, concave, and convex) on flow resistance law was studied. The part paper is based a theoretical equation to estimate Darcy–Weisbach friction factor f, deduced from power velocity distribution measurements performed plot. At first, Γ parameter calibrated using all available measurements. Then an analysis hydrau...

The temporal variability in currents, temperature, and particulate matter concentration were measured in the Mississippi Canyon axis where the thalweg was 300m deep from May–July and August–November 1998 using current meters, thermographs, a light-scattering sensor, and sediment traps. Canyon sediments were sampled by coring and observed using an ROV video camera. Currents in the upper Mississi...

During the May 18, 1980, eruption of Mount St. Helens, Washington, a pyroclastic surge introduced large volumes of coarse woody debris (CWD) and fine grained sediment to Clearwater Creek, approximately 15 km northeast of the summit. Effects of controlled CWD removal on sediment storage, substrate, and pool frequency and volume were measured in four reaches, each with three 200-m segments, from ...

Several studies have shown that large wood has a prominent role in habitat quality, however there is little research on the role of wood on pool characteristics and other habitat components in low gradient streams (channel slopes less than one percent). Longitudinal profiles are used to analyze general residual pool characteristics of three approximately 1000meter stream reaches with similar st...