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Bathymetry, Substrate and Circulation in Westcott Bay, San Juan Islands, Washington: Open-File Report 2007-1305 by Eric Grossman, United U. S. Department of the Interior, Et Al - Paperback
60.90 درهم

Bathymetry, Substrate and Circulation in Westcott Bay, San Juan Islands, Washington: Open-File Report 2007-1305 by Eric Grossman, United U. S. Department of the Interior, Et Al - Paperback

كن أول من يقيِّم هذا المنتج 

60.90 درهم 

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الأسعار تشمل ضريبة القيمة المضافة  التفاصيل
رقم ال ISBN
9781288744350
الفئات
سياسة
الكاتب
Eric Grossman, United U. S. Department of the Interior, Et Al
الناشر
Bibliogov
الوصف:

Nearshore bathymetry, substrate type, and circulation patterns in Westcott Bay, San Juan Islands, Washington, were mapped using two acoustic sonar systems, video and direct sampling of seafloor sediments. The goal of the project was to characterize nearshore habitat and conditions influencing eelgrass (Z. marina) where extensive loss has occurred since 1995. A principal hypothesis for the ...

تشحن من الولايات المتحدة
اشحن الى دبي (تغيير المدينة)
التوصيل خلال الإثنين ٣ سبتمبر - الأربعاء ٥ سبتمبر الي دبي

حالة السلعة:
جديدة
البائع:
InternationalBookStore (87% تقييم ايجابي)

معلومات المنتج

  •  

    المواصفات

    رقم ال ISBN
    9781288744350
    الفئات
    سياسة
    الرقم المميز للسلعة
    2724354521803
    المؤلفين
    الكاتب
    Eric Grossman, United U. S. Department of the Interior, Et Al
    المؤلفين
    الناشر
    Bibliogov
    رقم ال ISBN
    9781288744350
    الفئات
    سياسة
    الرقم المميز للسلعة
    2724354521803
    المؤلفين
    الكاتب
    Eric Grossman, United U. S. Department of the Interior, Et Al
    المؤلفين
    الناشر
    Bibliogov
    معلومات تقنية
    غلاف الكتاب
    غلاف عادي
    اللغات والبلدان
    لغة الكتاب
    الانجليزية
    إقرأ المزيد
  •  

    الوصف:

    Nearshore bathymetry, substrate type, and circulation patterns in Westcott Bay, San Juan Islands, Washington, were mapped using two acoustic sonar systems, video and direct sampling of seafloor sediments. The goal of the project was to characterize nearshore habitat and conditions influencing

    Nearshore bathymetry, substrate type, and circulation patterns in Westcott Bay, San Juan Islands, Washington, were mapped using two acoustic sonar systems, video and direct sampling of seafloor sediments. The goal of the project was to characterize nearshore habitat and conditions influencing eelgrass (Z. marina) where extensive loss has occurred since 1995. A principal hypothesis for the loss of eelgrass is a recent decrease in light availability for eelgrass growth due to increase in turbidity associated with either an increase in fine sedimentation or biological productivity within the bay. To explore sources for this fine sediment and turbidity, a dual-frequency Biosonics sonar operating at 200 and 430 kHz was used to map seafloor depth, morphology and vegetation along 69 linear kilometers of the bay. The higher frequency 430 kHz system also provided information on particulate concentrations in the water column. A boat-mounted 600 kHz RDI Acoustic Doppler Current Profiler (ADCP) was used to map current velocity and direction and water column backscatter intensity along another 29 km, with select measurements made to characterize variations in circulation with tides. An underwater video camera was deployed to ground-truth acoustic data. Seventy one sediment samples were collected to quantify sediment grain size distributions across Westcott Bay. Sediment samples were analyzed for grain size at the Western Coastal and Marine Geology Team sediment laboratory in Menlo Park, Calif. These data reveal that the seafloor near the entrance to Westcott Bay is rocky with a complex morphology and covered with dense and diverse benthic vegetation. Current velocities were also measured to be highest at the entrance and along a deep channel extending 1 km into the bay. The substrate is increasingly comprised of finer sediments with distance into Westcott Bay where current velocities are lower. This report describes the data collected and preliminary findings of USGS Cruise B-6.

    خصائص المنتج:
    • الفئات: سياسة
    • غلاف الكتاب: غلاف عادي
    • لغة الكتاب: الانجليزية
    • الكاتب: Eric Grossman, United U. S. Department of the Interior, Et Al
    • الناشر: Bibliogov
    • رقم ال ISBN: 9781288744350
    • عدد الصفحات: 46
    • لأبعاد (الارتفاع*العرض*العمق): 9.69 x 7.44 x 0.1 inches
 

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