scholarly journals Production of a Curve Number map using GIS Techniques in the watershed of the high Sebou (Morocco)

2020 ◽  
Vol 150 ◽  
pp. 03003
Author(s):  
Btissam Jabri ◽  
Mohammed Abdelbaset Hessane
Keyword(s):  
Geographical Information Systems ◽  
Hydrological Modeling ◽  
Curve Number ◽  
Geographical Information ◽  
Automatic Extraction ◽  
Drainage Network ◽  
Hydrological Models ◽  
Digital Terrain ◽  
Terrain Models ◽  
In The Beginning

This work focusing on the collection and preparation of necessary data for hydrological modeling of High Sebou watershedupstream of the dam Allal El Fassi. It describes a methodology for combining space technologies, including geographical information systems (GIS), remote sensing and digital terrain models (DTM), with hydrological models with a view to prepare for a spatial hydrologic modeling whose used for flood forecasting. The methodology for conducting this study comes in several parts: The collection and processing of geographic data constituted the first part of this project. This approach is, in the beginning, to automatic extraction of sub-basins and drainage network, then the formatting of data for the mapping of the basin and finally, the preparation of the land use and soil for the development of a map of Curve Number (CN).

scholarly journals Application of the HEC-HMS hydrological model in the Beht watershed (Morocco)

2021 ◽  
Vol 314 ◽  
pp. 05003
Author(s):  
Fatima Daide ◽  
Rachida Afgane ◽  
Abderrahim Lahrach ◽  
Abdel-Ali Chaouni ◽  
Mohamed Msaddek ◽  
...  
Keyword(s):  
Geographical Information Systems ◽  
Curve Number ◽  
Hydrological Modelling ◽  
Geographical Information ◽  
Automatic Extraction ◽  
Hydrological Models ◽  
Digital Terrain ◽  
Terrain Models ◽  
Land Cover Data ◽  
Daily Time

This work focused on the collection and preparation of the data required for the hydrological modelling of the Beht catchment area, which covers an area of 4560 km2 with a perimeter of 414 km, by combining the various spatial technologies, in particular geographical information systems (GIS), remote sensing, and digital terrain models (DTM), with hydrological models in order to prepare for spatial hydrological modelling used for flood forecasting. The methodology consists, at first, in the automatic extraction of the sub-basins and the drainage network. Then, edit these data using the HEC-GEO-HMS extension, and the preparation of the land use and land cover data for the elaboration of a Curve Number (CN) map of Beht watershed, then the import of the basin model into the Hydrologic Modeling System (HEC-HMS) to simulate the surface runoff using six extreme daily time series events.

scholarly journals SIG y Paisajes Virtuales en 3D. Posibilidades de divulgación de la Prehistoria Reciente de la Sierra de Atapuerca

2010 ◽  
Vol 1 (1) ◽  
pp. 141
Author(s):  
Francisco Javier Marcos Sáiz
Keyword(s):  
Geographical Information Systems ◽  
Settlement Patterns ◽  
3D Modelling ◽  
Geographical Information ◽  
Archaeological Sites ◽  
3D Animation ◽  
Technical Process ◽  
Digital Terrain ◽  
Ecological Features ◽  
Terrain Models

<p>Archaeology has developed several theoretical and methodological perspectives with the application of the Geographical Information Systems (GIS), Digital Terrain Models (DTM), Virtual Reality (VR) and the 3D Modelling. In the spreading a gradual progress has begun for mapping the sites on its environmental context with the virtual generation of the topographic and ecological features. The aim of this paper is the analysis of the possibilities of spreading of the settlement patterns in the Late Prehistory around Sierra de Atapuerca (Burgos), VI to II millennium cal. BC-. The technical process is the modelling and 3D animation for video of Virtual Landscapes with GIS. The conclusion is that the Virtual Flying with GIS is a fundamental tool for the graphical spreading of the prehistoric settlement, especially with archaeological sites of surveys.</p>

scholarly journals Probability maps as a measure of reliability for indivisibility analysis

Spatium ◽  
2005 ◽  
pp. 22-27
Author(s):  
Dusan Joksic ◽  
Branislav Bajat
Keyword(s):  
Information Systems ◽  
Spatial Data ◽  
Geographical Information Systems ◽  
Simple Algorithm ◽  
Geographical Information ◽  
Digital Terrain ◽  
Terrain Models ◽  
Probability Maps ◽  
Systems Software ◽  
Terrain Representation

Digital terrain models (DTMs) represent segments of spatial data bases related to presentation of terrain features and landforms. Square grid elevation models (DEMs) have emerged as the most widely used structure during the past decade because of their simplicity and simple computer implementation. They have become an important segment of Topographic Information Systems (TIS), storing natural and artificial landscape in forms of digital models. This kind of a data structure is especially suitable for morph metric terrain evaluation and analysis, which is very important in environmental and urban planning and Earth surface modeling applications. One of the most often used functionalities of Geographical information systems software packages is indivisibility or view shed analysis of terrain. Indivisibility determination from analog topographic maps may be very exhausting, because of the large number of profiles that have to be extracted and compared. Terrain representation in form of the DEMs databases facilitates this task. This paper describes simple algorithm for terrain view shed analysis by using DEMs database structures, taking into consideration the influence of uncertainties of such data to the results obtained thus far. The concept of probability maps is introduced as a mean for evaluation of results, and is presented as thematic display.

scholarly journals Rainfall-Runoff Modeling Using the HEC-HMS Model for the Al-Adhaim River Catchment, Northern Iraq

Hydrology ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 58
Author(s):  
Ahmed Naseh Ahmed Hamdan ◽  
Suhad Almuktar ◽  
Miklas Scholz
Keyword(s):  
Geographical Information Systems ◽  
Hydrological Model ◽  
Daily Rainfall ◽  
Curve Number ◽  
Geographical Information ◽  
Coefficient Of Determination ◽  
Rainfall Runoff ◽  
Time Step ◽  
River Catchment ◽  
Northern Iraq

It has become necessary to estimate the quantities of runoff by knowing the amount of rainfall to calculate the required quantities of water storage in reservoirs and to determine the likelihood of flooding. The present study deals with the development of a hydrological model named Hydrologic Engineering Center (HEC-HMS), which uses Digital Elevation Models (DEM). This hydrological model was used by means of the Geospatial Hydrologic Modeling Extension (HEC-GeoHMS) and Geographical Information Systems (GIS) to identify the discharge of the Al-Adhaim River catchment and embankment dam in Iraq by simulated rainfall-runoff processes. The meteorological models were developed within the HEC-HMS from the recorded daily rainfall data for the hydrological years 2015 to 2018. The control specifications were defined for the specified period and one day time step. The Soil Conservation Service-Curve number (SCS-CN), SCS Unit Hydrograph and Muskingum methods were used for loss, transformation and routing calculations, respectively. The model was simulated for two years for calibration and one year for verification of the daily rainfall values. The results showed that both observed and simulated hydrographs were highly correlated. The model’s performance was evaluated by using a coefficient of determination of 90% for calibration and verification. The dam’s discharge for the considered period was successfully simulated but slightly overestimated. The results indicated that the model is suitable for hydrological simulations in the Al-Adhaim river catchment.

scholarly journals Rainfall-Runoff Modeling Using NRCS-CN method and GIS approach

2020 ◽  
Author(s):  
Rekha Verma ◽  
Azhar Husain ◽  
Mohammed Sharif
Keyword(s):  
Hydrological Modeling ◽  
Curve Number ◽  
Geographical Information ◽  
Rainfall Runoff ◽  
Moisture Condition ◽  
Natural Resource Conservation ◽  
Antecedent Moisture ◽  
Natural Resource Conservation Service ◽  
Runoff Modeling ◽  
Runoff Depth

Rainfall-Runoff modeling is a hydrological modeling which is extremely important for water resources planning, development, and management. In this paper, Natural Resource Conservation Service-Curve Number (NRCS-CN) method along with Geographical Information System (GIS) approach was used to evaluate the runoff resulting from the rainfall of four stations, namely, Bilodra, Kathlal, Navavas and Rellawada of Sabarmati River basin. The rainfall data were taken for 10 years (2005-2014). The curve number which is the function of land use, soil and antecedent moisture condition (AMC) was generated in GIS platform. The CN value generated for AMC- I, II and III were 57.29, 75.39 and 87.77 respectively. Using NRCS-CN method, runoff depth was calculated for all the four stations. The runoff depth calculated with respect to the rainfall for Bilodra, Kathlal, Navavas and Rellawada shows a good correlation of 0.96. The computed runoff was compared with the observed runoff which depicted a good correlation of 0.73, 0.70, 0.76 and 0.65 for the four stations. This method results in speedy and precise estimation of runoff from a watershed.

scholarly journals COMPARAÇÃO ENTRE MÉTODOS DE MAPEAMENTO AUTOMÁTICO DE REDE DE DRENAGEM UTILIZANDO SIG

Irriga ◽  
2015 ◽  
Vol 20 (3) ◽  
pp. 445-457
Author(s):  
Raoni Wainer Duarte Bosquilia ◽  
Peterson Ricardo Fiorio ◽  
Sérgio Nascimento Duarte ◽  
Rafael Mingoti
Keyword(s):  
Flow Direction ◽  
Drainage Network ◽  
Digital Terrain ◽  
Terrain Models ◽  
Contour Lines ◽  
Two Factors ◽  
Automatic Mapping ◽  
Automatic Methods ◽  
Para Determinar ◽  
Network Mapping

COMPARAÇÃO ENTRE MÉTODOS DE MAPEAMENTO AUTOMÁTICO DE REDE DE DRENAGEM UTILIZANDO SIG  RAONI WAINER DUARTE BOSQUILIA1; PETERSON RICARDO FIORIO2; SERGIO NASCIMENTO DUARTE2 E RAFAEL MINGOTI3 1Universidade Tecnológica Federal do Paraná – UTFPR, Câmpus Dois Vizinhos, Dois Vizinhos, PR, [email protected] Superior de Agricultura "Luiz de Queiroz" – ESALQ, Universidade de São Paulo, Piracicaba, SP, [email protected]; [email protected] Gestão Territorial, Campinas, SP, [email protected]  1 RESUMO A determinação da rede de drenagem por meio de Modelos Digitais de Terreno (MDT) vem se tornando um método cada vez mais importante e utilizado. Deste modo, o presente trabalho teve por objetivo comparar dois diferentes modelos de mapeamento automático de drenagens: D-8 e D-Infinity. Utilizou-se a rede de drenagem presente em cartas topográficas de Piracicaba-SP, escala 1:10.000, como prova de campo. O MDT foi gerado a partir das curvas de nível com equidistância de 5 metros presente nessas cartas. Para uma melhor comparação entre os métodos, foram analisados dois fatores: Comprimento das Drenagens e Número de Nascentes, sendo as análises realizadas apenas em caráter quantitativo. Para a avaliação desses fatores foram dispostas ao acaso doze amostras circulares de área 1,76 km² e realizou-se um teste de médias de Tukey. Para os dois parâmetros estudados, os modelos se apresentaram estatisticamente diferentes da prova de campo, porém as drenagens se apresentaram semelhantes visualmente às cartas topográficas. Quanto às nascentes, os métodos não apresentaram bons resultados. Mesmo assim, os modelos automáticos de mapeamento da rede de drenagem se mostraram ótimas ferramentas para determinar cursos d’água. Palavras-chave: Direção de Fluxo, Fluxo Acumulado, MDT, bacia hidrográfica, TauDEM.  BOSQUILIA, R. W. D.; FIORIO, P. R.; DUARTE, S. N.; MINGOTI, R.COMPARISON OF AUTOMATIC METHODS OF DRAINAGE NETWORK MAPPING USING GIS  2 ABSTRACT Determining drainage network by Digital Terrain   Models (DTM) has become an increasingly important and used method.   Thus, this study aimed to compare  two different models of automatic mapping of drainage:   D-8 and  D-Infinity. The  drainage network   from  topographic charts of Piracicaba-SP, 1:10.000 scale was used as field reality.   DTM was generated based on 5 meter-contour lines in those charts. Two factors were analyzed for a better comparison between methods:  Length of Drainage and Number of Springs. The analyses were  performed just  quantitatively.  A total of twelve circular samples  at random, 1.76 km² area,  were generated  to evaluate those factors. Also, means were compared using the Tukey test.  For both parameters, the models were statistically different from the field reality; however, drainages were visually similar to the topographic charts.  As to   the springs, good results could not be found based on  methods.  Even so, the automatic models of drainage network mapping  proved to be excellent tools to determine waterways. Keywords: flow direction, accumulated flow, DTM, watershed, TauDEM.

scholarly journals Validation of the modified Témez rational model in the watersheds of Norte de Santander, Colombia

2021 ◽  
Vol 2073 (1) ◽  
pp. 012017
Author(s):  
N J Cely-Calixto ◽  
G A Carrillo Soto ◽  
D Becerra-Moreno
Keyword(s):  
Multivariate Regression ◽  
Flow Measurement ◽  
Hydrological Modeling ◽  
Hydrological Cycle ◽  
Drainage Network ◽  
Hydrological Models ◽  
Rational Model ◽  
Flow Rates ◽  
Statistical Verification ◽  
Made In

Abstract Physics includes the study and investigation of the phases that make up the hydrological cycle, including the estimation of flow rates in river basins, most of which are not instrumented, i.e., they lack historical records of circulating flows. For this situation, the application of hydrological models can allow flow estimates to be made. In the Department of Norte de Santander, Colombia, some watersheds do not have instrumentation for flow measurement or hydrological modeling methodologies appropriate to the site. Therefore, methods such as the modified rational model of Teméz are used, even without knowing the relevance of its applicability to the site conditions. Consequently, for the present research, the Teméz model was validated in watersheds of the Norte de Santander Department to estimate the values of extreme flows with a return period of 100 years. In this sense, 11 watersheds were selected, which contained historical rainfall data greater than 20 years and a drainage network of fewer than 1000 Km2. It was found that the Teméz model overestimates the real flows of the 11 hydrological basins, where the climatological parameters used in the application of the Fhrüling factor and its statistical verification using multivariate regression did not achieve an acceptable correlation.

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