scholarly journals Coral Reef Benthic Video Surveys Facilitate Long-Term Monitoring in the Commonwealth of the Northern Mariana Islands: Toward an Optimal Sampling Strategy

2006 ◽  
Vol 60 (2) ◽  
pp. 177-189 ◽  
Author(s):  
Peter Houk ◽  
Robert Van Woesik
Keyword(s):  
Coral Reef ◽  
Sampling Strategy ◽  
Optimal Sampling ◽  
Mariana Islands ◽  
Northern Mariana Islands ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Video Surveys

scholarly journals Informing coral reef management decisions at four U.S. National Parks in the Pacific using long‐term monitoring data

Ecosphere ◽  
2016 ◽  
Vol 7 (10) ◽  
Author(s):  
Eric K. Brown ◽  
Sheila A. McKenna ◽  
Sallie C. Beavers ◽  
Tim Clark ◽  
Michael Gawel ◽  
...  
Keyword(s):  
Coral Reef ◽  
National Parks ◽  
Monitoring Data ◽  
Management Decisions ◽  
Reef Management ◽  
The Pacific ◽  
Coral Reef Management ◽  
Long Term Monitoring ◽  
Term Monitoring

scholarly journals Fringing Reefs of Reunion Island and Eutrophication Effects - Part 1: Long-Term Monitoring of Two Shallow Coral Reef Communities

2013 ◽  
Vol 596 ◽  
pp. 1-35 ◽  
Author(s):  
Catherine Tourrand ◽  
Odile Naim ◽  
Lionel Bigot ◽  
Chrisophe Cadet ◽  
Bruce Cauvin ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reunion Island ◽  
Fringing Reefs ◽  
Reef Communities ◽  
Réunion Island ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Coral Reef Communities

scholarly journals Plot and field scale soil moisture dynamics and subsurface wetness control on runoff generation in a headwater in the Ore Mountains

2010 ◽  
Vol 14 (6) ◽  
pp. 873-889 ◽  
Author(s):  
E. Zehe ◽  
T. Graeff ◽  
M. Morgner ◽  
A. Bauer ◽  
A. Bronstert
Keyword(s):  
Soil Moisture ◽  
Sampling Strategy ◽  
Morphological Parameters ◽  
Antecedent Soil Moisture ◽  
Soil Moisture Dynamics ◽  
Long Term Monitoring ◽  
Grassland Site ◽  
Term Monitoring ◽  
Moisture Dynamics

Abstract. This study presents an application of an innovative sampling strategy to assess soil moisture dynamics in a headwater of the Weißeritz in the German eastern Ore Mountains. A grassland site and a forested site were instrumented with two Spatial TDR clusters (STDR) that consist of 39 and 32 coated TDR probes of 60 cm length. Distributed time series of vertically averaged soil moisture data from both sites/ensembles were analyzed by statistical and geostatistical methods. Spatial variability and the spatial mean at the forested site were larger than at the grassland site. Furthermore, clustering of TDR probes in combination with long-term monitoring allowed identification of average spatial covariance structures at the small field scale for different wetness states. The correlation length of soil water content as well as the sill to nugget ratio at the grassland site increased with increasing average wetness and but, in contrast, were constant at the forested site. As soil properties at both the forested and grassland sites are extremely variable, this suggests that the correlation structure at the forested site is dominated by the pattern of throughfall and interception. We also found a very strong correlation between antecedent soil moisture at the forested site and runoff coefficients of rainfall-runoff events observed at gauge Rehefeld. Antecedent soil moisture at the forest site explains 92% of the variability in the runoff coefficients. By combining these results with a recession analysis we derived a first conceptual model of the dominant runoff mechanisms operating in this catchment. Finally, we employed a physically based hydrological model to shed light on the controls of soil- and plant morphological parameters on soil average soil moisture at the forested site and the grassland site, respectively. A homogeneous soil setup allowed, after fine tuning of plant morphological parameters, most of the time unbiased predictions of the observed average soil conditions observed at both field sites. We conclude that the proposed sampling strategy of clustering TDR probes is suitable to assess unbiased average soil moisture dynamics in critical functional units, in this case the forested site, which is a much better predictor for event scale runoff formation than pre-event discharge. Long term monitoring of such critical landscape elements could maybe yield valuable information for flood warning in headwaters. We thus think that STDR provides a good intersect of the advantages of permanent sampling and spatially highly resolved soil moisture sampling using mobile rods.

scholarly journals Plot and field scale soil moisture dynamics and subsurface wetness control on runoff generation in a headwater in the Ore Mountains

2009 ◽  
Vol 6 (6) ◽  
pp. 7503-7537 ◽  
Author(s):  
E. Zehe ◽  
T. Graeff ◽  
M. Morgner ◽  
A. Bauer ◽  
A. Bronstert
Keyword(s):  
Soil Moisture ◽  
Sampling Strategy ◽  
Runoff Generation ◽  
Field Scale ◽  
Soil Moisture Dynamics ◽  
Long Term Monitoring ◽  
Grassland Site ◽  
Term Monitoring ◽  
Moisture Dynamics

Abstract. This study presents an application of an innovative sampling strategy to assess soil moisture dynamics in a headwater of the Weißeritz in the German eastern Ore Mountains. A grassland site and a forested site were instrumented with two Spatial TDR clusters (STDR) that consist of 39 and 32 coated TDR probes of 60 cm length. Distributed time series of vertically averaged soil moisture data from both sites/ensembles were analyzed by statistical and geostatistical methods. Spatial variability and the spatial mean at the forested site were larger than at the grassland site. Furthermore, clustering of TDR probes in combination with long-term monitoring allowed identification of average spatial covariance structures at the small field scale for different wetness states. The correlation length of soil water content as well as the sill to nugget ratio at the grassland site increased with increasing average wetness and but, in contrast, were constant at the forested site. As soil properties at both the forested and grassland sites are extremely variable, this suggests that the correlation structure at the forested site is dominated by the pattern of throughfall and interception. We also found a strong correlation between average soil moisture dynamics and runoff coefficients of rainfall-runoff events observed at gauge Rehefeld, which explains almost as much variability in the runoff coefficients as pre-event discharge. By combining these results with a recession analysis we derived a first conceptual model of the dominant runoff mechanisms operating in this catchment. Finally, long term simulations with a physically based hydrological model were in good/acceptable accordance with the time series of spatial average soil water content observed at the forested site and the grassland site, respectively. Both simulations used a homogeneous soil setup that closely reproduces observed average soil conditions observed at the field sites. This corroborates the proposed sampling strategy of clustering TDR probes in typical functional units is a promising technique to explore the soil moisture control on runoff generation. Long term monitoring of such sites could maybe yield valuable information for flood warning. The sampling strategy helps furthermore to unravel different types of soil moisture variability.

scholarly journals Long-term monitoring of coral reef condition at Abang Islands and around area, Batam Islands, Kepulauan Riau, Indonesia

2019 ◽  
Author(s):  
Muhammad Abrar ◽  
Tri Aryono ◽  
Yaya Ihya Ulumuddin ◽  
Giyanto
Keyword(s):  
Coral Reef ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Reef Condition

scholarly journals Long-term monitoring of coral reef fish assemblages in the Western central pacific

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Adel Heenan ◽  
Ivor D. Williams ◽  
Tomoko Acoba ◽  
Annette DesRochers ◽  
Randall K. Kosaki ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Fish Assemblages ◽  
Central Pacific ◽  
Long Term Monitoring ◽  
Term Monitoring

scholarly journals Long-term monitoring of habitats and reef fish found inside and outside the U.S. Virgin Islands Coral Reef National Monument: A comparative assessment

2009 ◽  
Vol 45 (2-3) ◽  
pp. 338-347 ◽  
Author(s):  
Mark E. Monaco ◽  
Alan M. Friedlander ◽  
Chris Caldow ◽  
Sarah D. Hile ◽  
Charles Menza ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Virgin Islands ◽  
Comparative Assessment ◽  
National Monument ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
The U.S

Long-Term Monitoring of Temperature Differences in a Steel Truss Bridge with Two-Layer Decks Compared with Bridge Codes: Case Study

2021 ◽  
Vol 26 (3) ◽  
pp. 05020013
Author(s):  
Gaoxin Wang ◽  
Xin Zhou ◽  
Youliang Ding ◽  
Xingwang Liu
Keyword(s):  
Steel Truss Bridge ◽  
Steel Truss ◽  
Long Term Monitoring ◽  
Truss Bridge ◽  
Term Monitoring

Future Needs for Long-Term Monitoring Design

2003 ◽  
Author(s):  
Barbara S. Minsker ◽  
Charles Davis ◽  
David Dougherty ◽  
Gus Williams
Keyword(s):  
Monitoring Design ◽  
Future Needs ◽  
Long Term Monitoring ◽  
Term Monitoring
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