Understanding, analysing, and predicting the erosion mechanisms and sedimentary flows produced by catchments plays a key role in environmental conservation and restoration management and policies. Numerical case-testing studies are generally undertaken to analyse the sensitivity of flood and soil erosion processes to the physical characteristics of catchments. Most analyses are conducted on simple virtual catchments with physical characteristics that, unlike real catchments, are perfectly controlled. Virtual catchments generally correspond to V-shaped valley catchments. However, although these catchments are suitable for methodical analysis of the results, they do not provide a realistic representation of the spatial structures of the landscape and field conditions. They can, therefore, lead to potential modelling errors and can make it difficult to extend or generalize their results. Our proposed method bridges the gap between real and traditional virtual catchments by creating realistic virtual catchments with perfectly controllable physical characteristics. Our approach represents a real alternative to traditional test case procedures and provides a new framework for geomorphological and hydrological communities. It combines a field procedural generation approach, geographic information system processing procedures, and the CAESAR-Lisflood landscape evolution model. We illustrate how each of these components acts in the process of generating virtual catchments. Five physical parameters were adjusted and tested for each virtual catchment: drainage density, hypsometric integral, mean slope of the main channel, granulometry, and land use. One of our virtual catchments is compared with a real catchment and a virtual catchment produced by a standard method. This comparison indicates that our approach can produce more realistic virtual catchments than those produced by more traditional methods, while a high degree of controllability is maintained. This new method of generating virtual catchments therefore offers significant research potential to identify the impacts of the physical characteristics of catchments on hydro-sedimentary dynamics and responses.
Bibliographical noteThis is the peer reviewed version of the following article 'Generation of realistic
synthetic catchments to explore fine continental surface processes', Earth Surface Processes and Landforms, vol. 46, no. 3, pp. 593-610, which has been published in final form at https://doi.org/10.1002/esp.5048. This article may be used for noncommercial purposes in accordance with Wiley Terms and Conditions for SelfArchiving.
This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.
This work was financed by the Seine Normandy Water Agency (AESN) and also obtained financial support from the OZCAR Research Infrastructure (French Critical Zone Observatories, Research and Applications) through the Réseau de Bassins Versants (RBV).
- controllable physical characteristics
- GIS processing
- procedural generation
- realistic virtual catchments
ASJC Scopus subject areas
- Geography, Planning and Development
- Earth-Surface Processes
- Earth and Planetary Sciences (miscellaneous)
Kuelewa, kuchambua, na kutabiri taratibu za mmomonyoko na mtiririko wa sedimentary zinazozalishwa na mifereji ya maji ina jukumu muhimu katika uhifadhi wa mazingira na usimamizi wa kurejesha na sera. Numerical kesi-kupima masomo ni kawaida kufanywa kuchambua unyeti wa mafuriko na mchakato wa uharibifu wa udongo kwa sifa za kimwili ya catchments. Uchambuzi wengi ni uliofanywa juu ya mifereji rahisi virtual na sifa za kimwili ambayo, tofauti na mifereji halisi, ni kikamilifu kudhibitiwa. Matofali ya kweli kwa ujumla yanalingana na mito ya bonde yenye umbo la V. Hata hivyo, ingawa mifereji hii ni sahihi kwa ajili ya uchambuzi utaratibu wa matokeo, wao si kutoa uwakilishi wa kweli wa miundo ya kijiografia ya mazingira na hali ya shamba. Kwa hiyo, wanaweza kusababisha uwezekano wa makosa ya modeling na inaweza kufanya kuwa vigumu kupanua au generalize matokeo yao. Mbinu yetu iliyopendekezwa inashughulikia pengo kati ya mifereji halisi na ya jadi ya virtual kwa kuunda mifereji halisi ya virtual na sifa za kimwili zinazoweza kudhibitiwa kikamilifu. Njia yetu inawakilisha mbadala halisi kwa taratibu za kawaida za kesi ya mtihani na hutoa mfumo mpya kwa jamii za geomorphological na hydrological. Ni inachanganya uwanja utaratibu kizazi mbinu, utaratibu wa usindikaji mfumo wa habari ya kijiografia, na CAESAR-Lisflood mazingira ya mageuzi mfano. Sisi kuonyesha jinsi kila moja ya vipengele hivi vitenda katika mchakato wa kuzalisha catchments virtual. Vipimo vitano vya kimwili vilirekebishwa na kupimwa kwa kila eneo la kuondoa: wiani wa mifereji, integral ya hypsometric, mwinuko wa wastani wa mfereji kuu, granulometry, na matumizi ya ardhi. Moja ya mifereji yetu virtual ni ikilinganishwa na mifereji halisi na mifereji virtual zinazozalishwa na mbinu ya kawaida. Ulinganisho huu unaonyesha kwamba mbinu yetu inaweza kuzalisha zaidi ya kweli virtual catchments kuliko wale zinazozalishwa na mbinu zaidi ya jadi, wakati kiwango cha juu cha controllability ni kudumishwa. Kwa hiyo, mbinu hii mpya ya kuzalisha mifereji ya maji ya kweli inatoa uwezekano mkubwa wa utafiti wa kutambua athari za sifa za kimwili za mifereji ya maji juu ya mienendo ya maji na majibu. "Kumbuka: Hii ni toleo la maoni ya wenzao ya makala ifuatayo ""Kuzalisha mifereji ya kweli ya synthetic kuchunguza michakato ya uso wa bara nzuri,"" Earth Surface Processes and Landforms, vol." 46: (a) Kwa nini? 3, ukurasa wa 3. "Kama ilivyoelezwa katika taarifa ya mwisho ya Tume ya Mawasiliano ya Uholanzi, ilichapishwa katika fomu ya mwisho kwenye tovuti ya ""https: www.doi.org.uk"" (http: www.doi.org.uk) na ""sp.gov.uk"" (http: www.doi.org.uk)." Makala hii inaweza kutumika kwa madhumuni yasiyo ya kibiashara kwa mujibu wa Wiley Masharti na Masharti kwa SelfArchiving. Hati hii ni toleo la mwandishi baada ya kuchapishwa, ikijumuisha marekebisho yoyote yaliyokubaliwa wakati wa mchakato wa ukaguzi wa wenzao. Kuna tofauti kati ya toleo la awali na toleo hili, na tunashauriwa kuwasiliana na toleo la awali ikiwa unataka kutaja kutoka kwake. Kazi hii ilifadhiliwa na Shirika la Maji la Seine-Normandie (AESN) na pia ilipata msaada wa kifedha kutoka kwa OZCAR (Utafiti wa Kifaransa wa Maeneo ya Muhimu, Utafiti na Matumizi) kupitia Réseau des bassins versants (RVV). - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS - Utaratibu wa GIS