Cellular modelling of muddjy floods occurring in dry valleys : advances and challenges
Identifieur interne : 000D20 ( Main/Exploration ); précédent : 000D19; suivant : 000D21Cellular modelling of muddjy floods occurring in dry valleys : advances and challenges
Auteurs : Johnny Douvinet [France] ; Vincent Viel [France] ; Daniel Delahaye [France] ; Patrice Langlois [France] ; Patrick Le Gouée [France] ; David GaillardSource :
Abstract
Runoff and soil erosion have been successfully modelled since many years using distributed, hydrological, expert-rules and physics methods, but these are especially carried out at small scales and none can simulate muddy floods occurring at large scales according to local rules. Conversely, Cellular Automata (CA) models fail to replicate real discharges because they use relatively simple rules based on abstractions of hydrological process. In this work, we present the framework provided for identifying processes that are fundamental to simulate complex muddy floods phenomena in dry valleys. Within the Geographical Cellular Automata model RUICELLS (Runoff routIng on CELLular MeSh), environmental variables are progressively implemented in the cellular routing scheme. Several simulations highlight influence of controlling factors of first and second orders playing a key role on these floods from local to global scales. The morphological components have a major influence at the catchment scale whereas land use data aggravate topographic efficiency at the local scale. The violence and brutality of several muddy floods in some sub-catchments result from the conjunction of high rainfalls, high morphological potential and cultivated areas prone to generate high sediment content. This approach confirms the possibility of simulating the global behaviour of environmental systems through local rules using afar simpler solution and also underlines the importance of morphological forcing on muddy floods occuring in dry valleys.
Url:
Affiliations:
- France
- Basse-Normandie, Haute-Normandie, Pays de la Loire, Région Bretagne, Région Normandie
- Angers, Brest, Caen, Le Havre, Nantes, Rennes, Rouen
- Université Rennes 2 Haute Bretagne, Université d'Angers, Université de Bretagne Occidentale, Université de Caen Basse-Normandie, Université de Nantes, Université de Rouen, Université du Havre, Université européenne de Bretagne
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Le document en format XML
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BP 13522 - 44035 Nantes cedex 1</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-nantes.fr/</ref></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300314" type="direct"><org type="institution" xml:id="struct-300314" status="VALID"><orgName>Université de Bretagne Occidentale</orgName><orgName type="acronym">UBO</orgName><desc><address><addrLine>3 Rue des Archives 29238 Brest</addrLine><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-406201" type="direct"><org type="institution" xml:id="struct-406201" status="VALID"><orgName>Université Rennes 2</orgName><desc><address><addrLine>Place du recteur Henri Le Moal - CS 24307 - 35043 Rennes cedex</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rennes2.fr/</ref></desc></org></tutelle><tutelle name="UMR6554" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Angers</settlement><region type="region" nuts="2">Pays de la Loire</region></placeName><orgName type="university">Université d'Angers</orgName><placeName><settlement type="city">Nantes</settlement><region type="region" nuts="2">Pays de la Loire</region></placeName><orgName type="university">Université de Nantes</orgName><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Brest</settlement><region type="region" nuts="2">Région Bretagne</region></placeName><orgName type="university">Université de Bretagne Occidentale</orgName><orgName type="institution" wicri:auto="newGroup">Université européenne de Bretagne</orgName><placeName><settlement type="city">Rennes</settlement><region type="region" nuts="2">Région Bretagne</region></placeName><orgName type="university">Université Rennes 2 Haute Bretagne</orgName><orgName type="institution" wicri:auto="newGroup">Université européenne de Bretagne</orgName></affiliation></author><author><name sortKey="Viel, Vincent" sort="Viel, Vincent" uniqKey="Viel V" first="Vincent" last="Viel">Vincent Viel</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-929" status="VALID"><orgName>Littoral, Environnement, Télédétection, Géomatique</orgName><orgName type="acronym">LETG - 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76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="FRE2795" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Le Havre</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université du Havre</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Le Gouee, Patrick" sort="Le Gouee, Patrick" uniqKey="Le Gouee P" first="Patrick" last="Le Gouée">Patrick Le Gouée</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-929" status="VALID"><orgName>Littoral, Environnement, Télédétection, Géomatique</orgName><orgName type="acronym">LETG - Géophen</orgName><desc><address><addrLine>Campus 1 Esplanade de la Paix - BP 5186 14032 CAEN CEDEX 5</addrLine><country key="FR"></country></address><ref type="url">http://letg.univ-nantes.fr</ref></desc><listRelation><relation active="#struct-74911" type="direct"></relation><relation active="#struct-93263" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300314" type="direct"></relation><relation active="#struct-406201" type="direct"></relation><relation name="UMR6554" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-74911" type="direct"><org type="institution" xml:id="struct-74911" status="VALID"><orgName>Université d'Angers</orgName><orgName type="acronym">UA</orgName><desc><address><addrLine>40 rue de Rennes - BP 73532 - 49035 Angers cedex 01</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-angers.fr/</ref></desc></org></tutelle><tutelle active="#struct-93263" type="direct"><org type="institution" xml:id="struct-93263" status="VALID"><orgName>Université de Nantes</orgName><orgName type="acronym">UN</orgName><desc><address><addrLine>1, quai de Tourville - BP 13522 - 44035 Nantes cedex 1</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-nantes.fr/</ref></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300314" type="direct"><org type="institution" xml:id="struct-300314" status="VALID"><orgName>Université de Bretagne Occidentale</orgName><orgName type="acronym">UBO</orgName><desc><address><addrLine>3 Rue des Archives 29238 Brest</addrLine><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-406201" type="direct"><org type="institution" xml:id="struct-406201" status="VALID"><orgName>Université Rennes 2</orgName><desc><address><addrLine>Place du recteur Henri Le Moal - CS 24307 - 35043 Rennes cedex</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rennes2.fr/</ref></desc></org></tutelle><tutelle name="UMR6554" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Angers</settlement><region type="region" nuts="2">Pays de la Loire</region></placeName><orgName type="university">Université d'Angers</orgName><placeName><settlement type="city">Nantes</settlement><region type="region" nuts="2">Pays de la Loire</region></placeName><orgName type="university">Université de Nantes</orgName><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Brest</settlement><region type="region" nuts="2">Région Bretagne</region></placeName><orgName type="university">Université de Bretagne Occidentale</orgName><orgName type="institution" wicri:auto="newGroup">Université européenne de Bretagne</orgName><placeName><settlement type="city">Rennes</settlement><region type="region" nuts="2">Région Bretagne</region></placeName><orgName type="university">Université Rennes 2 Haute Bretagne</orgName><orgName type="institution" wicri:auto="newGroup">Université européenne de Bretagne</orgName></affiliation></author><author><name sortKey="Gaillard, David" sort="Gaillard, David" uniqKey="Gaillard D" first="David" last="Gaillard">David Gaillard</name></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Runoff and soil erosion have been successfully modelled since many years using distributed, hydrological, expert-rules and physics methods, but these are especially carried out at small scales and none can simulate muddy floods occurring at large scales according to local rules. Conversely, Cellular Automata (CA) models fail to replicate real discharges because they use relatively simple rules based on abstractions of hydrological process. In this work, we present the framework provided for identifying processes that are fundamental to simulate complex muddy floods phenomena in dry valleys. Within the Geographical Cellular Automata model RUICELLS (Runoff routIng on CELLular MeSh), environmental variables are progressively implemented in the cellular routing scheme. Several simulations highlight influence of controlling factors of first and second orders playing a key role on these floods from local to global scales. The morphological components have a major influence at the catchment scale whereas land use data aggravate topographic efficiency at the local scale. The violence and brutality of several muddy floods in some sub-catchments result from the conjunction of high rainfalls, high morphological potential and cultivated areas prone to generate high sediment content. This approach confirms the possibility of simulating the global behaviour of environmental systems through local rules using afar simpler solution and also underlines the importance of morphological forcing on muddy floods occuring in dry valleys.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Basse-Normandie</li><li>Haute-Normandie</li><li>Pays de la Loire</li><li>Région Bretagne</li><li>Région Normandie</li></region><settlement><li>Angers</li><li>Brest</li><li>Caen</li><li>Le Havre</li><li>Nantes</li><li>Rennes</li><li>Rouen</li></settlement><orgName><li>Université Rennes 2 Haute Bretagne</li><li>Université d'Angers</li><li>Université de Bretagne Occidentale</li><li>Université de Caen Basse-Normandie</li><li>Université de Nantes</li><li>Université de Rouen</li><li>Université du Havre</li><li>Université européenne de Bretagne</li></orgName></list><tree><noCountry><name sortKey="Gaillard, David" sort="Gaillard, David" uniqKey="Gaillard D" first="David" last="Gaillard">David Gaillard</name></noCountry><country name="France"><region name="Pays de la Loire"><name sortKey="Douvinet, Johnny" sort="Douvinet, Johnny" uniqKey="Douvinet J" first="Johnny" last="Douvinet">Johnny Douvinet</name></region><name sortKey="Delahaye, Daniel" sort="Delahaye, Daniel" uniqKey="Delahaye D" first="Daniel" last="Delahaye">Daniel Delahaye</name><name sortKey="Langlois, Patrice" sort="Langlois, Patrice" uniqKey="Langlois P" first="Patrice" last="Langlois">Patrice Langlois</name><name sortKey="Le Gouee, Patrick" sort="Le Gouee, Patrick" uniqKey="Le Gouee P" first="Patrick" last="Le Gouée">Patrick Le Gouée</name><name sortKey="Viel, Vincent" sort="Viel, Vincent" uniqKey="Viel V" first="Vincent" last="Viel">Vincent Viel</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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