Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

damen, m. c. j.

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Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856662364

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: VI, Seiten 959-1074

Year of publication:: 2016

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856662364

Signature of the source:: ZS 312(26,7,3)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: Closing ceremony

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Working Group 6: Hydrology. Chairman: K. A. Ulbricht, Liaison: R. Spanhoff

Document type:: Multivolume work

Structure type:: Chapter

Symposium on Remote Sensing for Resources Development and Environmental Management/Enschede/August 1986 © 1987 Balkema, Rotterdam. ISBN 90 6191 674 7 1063 Working Group 6: Hydrology K.A.Ulbricht Chairman R. Spanhoff Liaison The activities of Working Group VI during the Enschede ISPRS conference 1986 involved one main session with 2 speakers, two oral sessions with in total 7 speakers planned, two poster sessions with in total 19 presentations, and one discussion meet ing. All but 5 presentations were given: the authors of two (posters) contributions did not show up unex pectedly, for the other three (one oral and two pos ter presentations) it was known or anticipated. The number of people attending the oral sessions was about twenty on the average, and slightly over fifty during the invited talk. The above figures illustrate the success of our meeting. The only dis appointment was the small number of participants in the discussion meeting. The total field of Working Group VI is very broad, covering all aggregation phases of water, from snow and ice, surface- and groundwater till water vapour; the latter, e.g., as a term in atmospheric correc tion procedures. So, apart from the general overview in the invited talk, the presented 23 papers, which in themselves ranged from a purely theoretical to a highly observational nature, can merely touch some aspects of some subjects for which recently progress has been made. Nevertheless, some general remarks and conclusions can be extracted. 1. Relatively much attention was paid in the oral presentations to more basic work aiming at a math ematical-physical description of the phenomena of interest: of the seven papers, one dealt with a mathematical description of the atmospheric correc tion based on one parameter, which can easily be obtained experimentally; one paper gave a model des cription for water-depth and bottom-composition as sessment; and one presented laboratory experiments which provided a better description of the wave length dependence of the light absorption by aquatic humus, and its possible consequences for the bottom- depth and water-component retrieval procedures. 1.1 Conclusion We feel that this basic approach of remote sensing in the field of Working Group VI was appropriately highlighted, since it is imperative that theory and experiment intermingle as equal partners in order to make progress in this area. 2. Being active in remote sensing is nowadays, rightly so, more and more considered from a user’s starting point. That is, remote sensing methods are invoked as one out of more, often complementary, measuring techniques to answer existing questions. This observation was stressed explicitly in the in vited talk by Prof. Cracknell, who quoted our state ment on this point of the programme of the confer ence prepared for the members of Working Group VI: "Remote sensing is no more but certainly no less than a (class of) measuring technique(s) employed to gather data on an object. Major differences with ’standard’ in-situ techniques is the synoptic view over vast areas like oceans. This often renders qual itative data worthwhile but, of course, quantitative information has to be preferred. However, measuring is not a goal in itself. A remote sensing technique is borne out only then, when it is invoked to solve existing (in this case oceanographic) problems; in such a case it will be readily applied as one out of a series of measuring techniques, the others being either in-situ measurements or other remote sensing techniques". It is noteworthy in this respect that professor Cracknell postulated that, e.g., oceanographic cruises will always be necessary in addition to remo te sensors. A nice illustration of this ’user-approach’ was presented in the co-invited talk given by Dr. Jons- son. Setting up a current model for the Strait of Oresund, he has looked for remote sensing data which could help herein. A nice feature was, furthermore, that qualitative remote sensing data could be used, in a kind of sensitivity analysis, to see which (sometimes unexpected) effects should be included in the model, and which terms could be neglected. Simi lar trends were observed in some other presentations as well. 2.1 Recommendation This ’user-approach’ in the application of remote sensing techniques should be pursued. 3. The future of Working Group VI of Commission VII of the ISPRS was discussed in a dedicated session in which only eight persons participated. This meeting and its conclusions can, therefore, not be considered as representative for the Working Group. The feeling was that the Working Group should continue to act as a forum to exchange information not only about re sults, but also about who is doing what and, poss ibly, with whom one can exchange which data. No need emerged from joint projects to be executed by the Working Group.

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