geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The use of high-resolution field laser scanning for mapping surface topography in fluvial systems


, : The use of high-resolution field laser scanning for mapping surface topography in fluvial systems. IAHS-AISH Publication 291(Pages 269-277

Advances in spatial analytical software allow digital elevation models (DEMs) to be produced which accurately represent landform surface variability and offer an important opportunity to measure and monitor morphological change and sediment transfer across a variety of spatial scales. Many of the techniques presently employed (aerial LIDAR, EDM theodolites, GPS, photogrammetry) suffer coverage or resolution limitations resulting in a trade off between spatial coverage and morphologic detail captured. This issue is particularly important when rates of spatial and temporal change are considered for fluvial systems. This paper describes the field and processing techniques required for oblique laser scanning to acquire 0.01-m resolution digital elevation data of an upland reach of the River Wharfe in the UK. The study site is variable with rapidly changing morphology, diverse vegetation and the presence of water, and these are evaluated with respect to DEM accuracy. Issues regarding location, frequency and distance are discussed with reference to survey accuracy and efficiency for the scanner, and a field protocol is proposed. Data cloud merging was achieved with a high degree of accuracy (sub-centimetre) and scanner accuracy is shown to be very good for exposed surfaces. Vegetation and water decrease the accuracy, as the laser pulse is often prevented from reaching the ground surface or is not returned.

US$29.90


Other references

Hard, D.L., 2004: Innovative developments in the production and delivery of alternative protein sources. The alternative protein sources resulting from the meat and bone meal ban and population growth, including the promise of traditional plant breeding and agricultural biotechnology to address the protein shortage by enhancing animal nutrition and h...

Bruce L.; Grail A.; Hancock B.W., 1982: Iso ferritin studies using the leukocyte adherence inhibition assay in patients with malignant lymphoma. British Journal of Cancer 46(3): 512

Spors, S.; Schutt Gerowitt, H.; Kress, M.; Martini, A.; Hellriegel, K.P., 1982: Antimycotic treatment of granulocytopenic malignoma patients. Of 49 patients given ketoconazole at 200 mg/day for 24 days on av., 28 (49%) were mycologically positive and 21 (43%) negative.

Clark, J.W., 1989: Microbial agents in cancer treatment. Current Problems in Dermatology 18: 277-282

Hovatta, O., 1988: The physiology of sexual reactions in women. Duodecim; Laaketieteellinen Aikakauskirja 104(15): 1095-1101

Timmermans, J.P.; Barbiers, M.; Scheuermann, D.W.; Stach, W.; Adriaensen, D.; D.G.oodt Lasseel, M.H.A., 1993: Occurrence, distribution and neurochemical features of small intestinal neurons projecting to the cranial mesenteric ganglion in the pig. The small intestine of the pig has been investigated for its topographical distribution of enteric neurons projecting to the cranial mesenteric ganglion, by using Fast Blue or Fluorgold as a retrogradely transported neuronal tracer. Contrary to th...

D.F.rias, R.F.; Airoldi, C., 1999: Towards the thermochemical data of adducts involving glycine and cadmium chloride. The prepared adducts CdCl2cntdotxgly (x=1, 2 and gly = glycine) were characterized by infrared spectroscopy, thermogravimetry and differential scanning calorimetry. The infrared spectra showed that cadmium is coordinated through the carbonyl oxyge...

Ito, H.; Tanaka, S.; Miyasaka, M., 2002: Circular dichroism spectra of DNA quadruplexes (d(G5T5))4 as formed with G4 and T4 tetrads and (d(G5T5) cntdot d(A5C5))2 as formed with Watson-Crick-like (G-C)2 and (T-A)2 tetrads. We utilize electrophoresis and find that a thermally treated equimolar mixture of the oligonucleotide d(G5T5) and its complementary oligonucleotide d(A5C5) exhibits either two bands or a single band in one lane, depending on the conditions of the...

Dekker, W.; Grijm, R.; Wilmink, J.M.; ten Cate, J.W.; Meijne, N.G.; van der Schoot, J.B., 1968: The importance of angiography of the arteriovenous shunt in chronic intermittent dialysis. The potential survival of patients in chronic hemodialysis appears to be bordered by the limited places suited for insertion of an artificial arteriovenous shunt. If shunt problems occur angiography may reveal the possible existing vascular lesion...

Polinko, P.; Bradley, W.F.; Molyneaux, B.; Lukoff, C.; Erlen, J., 1995: HIV in health care workers: managing fear through a telephone information line. Social Work 40(6): 819-822