scholarly journals Rainfall-Runoff Simulation for Water Availability Estimation in Small Island Using Distributed Hydrological Model wflow

2021 ◽  
Vol 930 (1) ◽  
pp. 012050
Author(s):  
W Seizarwati ◽  
M Syahidah
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Water Availability ◽  
Hydrological Model ◽  
Small Island ◽  
Distributed Hydrological Model ◽  
Rainfall Runoff ◽  
Runoff Simulation ◽  
Area Index ◽  
Resources Management

Abstract Hydrological data in Indonesia, especially in the small islands, is minimal, including spatial distribution and temporal completeness. It will affect the accuracy of water availability estimation for water resources management interest. One of the solutions that can be undertaken is applying rainfall-runoff modeling to obtain the discharge value at a specific location. This study aims to determine surface water availability in each sub-catchment of the small island by implementing the hydrological model. The wflow model is applying to perform the model. This model uses input data including Digital Elevation Model (DEM), landuse, soil, Leaf Area Index (LAI), rainfall, evapotranspiration, and observation of river discharge for the calibration process. As a result, this island consists of 30 catchments with some potential catchments, namely Cao, Sakita, and Tatamo, that have a 90% dependable flow of 4213.3 L/s, 3803.6 L/s 8117 L/s, respectively. The result of water availability in Morotai Island is highly expected to be the reference for water resources management, especially for tourism and urban development.

scholarly journals Effects of digital elevation model resolution on topography-based runoff simulation under uncertainty

2014 ◽  
Vol 16 (6) ◽  
pp. 1343-1358 ◽  
Author(s):  
L. Cui ◽  
Y. P. Li ◽  
G. H. Huang ◽  
Y. Huang
Keyword(s):  
Water Resources ◽  
Digital Elevation Model ◽  
Water Resources Management ◽  
Rainfall Runoff ◽  
Runoff Simulation ◽  
Resources Management ◽  
Dem Resolution ◽  
Analysis Technique ◽  
Digital Elevation ◽  
Elevation Model

Topography plays a critical role in controlling water dispersion and soil movement in hydrologic modeling for water resources management with raster-based digital elevation model (DEM). This study aims to model effects of DEM resolution on runoff simulation through coupling fuzzy analysis technique with a topography based rainfall–runoff model (TOPMODEL). Different levels of DEM grid sizes between 30 m and 200 m are examined, and the results indicate that 30 m DEM resolution is the best for all catchments. Results demonstrate that the DEM resolution could have significant influence on the TOPMODEL rainfall–runoff simulation. Fuzzy analysis technique is used to further examine the uncertain DEM resolution based on considering Nash, sum of squared error, and sum of absolute error values of TOPMODEL. The developed model is calibrated and validated against observed flow during the period 2010–2012, and generally performed acceptably for model Nash–Sutcliffe value. The proposed method is useful for studying hydrological processes of watershed associated with topography uncertainty and providing support for identifying proper water resources management strategy.

scholarly journals Model Calibration Parameter Using Optimization Trial in HEC-HMS for Unda Watershed

2021 ◽  
Vol 930 (1) ◽  
pp. 012040
Author(s):  
G A P Eryani ◽  
I M S Amerta ◽  
M W Jayantari
Keyword(s):  
Simulation Model ◽  
Water Availability ◽  
Resource Planning ◽  
Rainfall Simulation ◽  
Calibration Model ◽  
Hydrological Process ◽  
Rainfall Runoff ◽  
Initial Model ◽  
Runoff Simulation ◽  
Resources Management

Abstract In water resource planning, information on water availability is needed. Nowadays, data on water availability is still difficult to obtain. With technology in the form of a rainfall-runoff simulation model that can predict water availability in the Unda watershed. It can add information about the potential for water in the Unda watershed. It can be used to prepare water resources management in the Unda watershed so that the existing potential can be used sustainably. Based on the rainfall simulation model results in the Unda watershed, it can be concluded that after running the initial model and calibration. The results are obtained R2 value was 0.68 and increased by 9.81% to 0.754. Both the initial model and the calibration model show an efficient R2 value, NASH value increases by 49.93% to 0.713, which includes satisfactory criteria, RMSE value of 1.135 and decreased by 49.47% to 0.758, and the PBIAS value was 44.70% which was classified as unsatisfactory and decreased from 80.24% to 24.80% at the time of calibration which was classified as satisfactory. In general, the overall simulation results are quite good for representing the watershed’s efficient hydrological process.

scholarly journals Changes in Dry-Season Water Availability and Attributions in the Yellow River Basin, China

2021 ◽  
Vol 9 ◽  
Author(s):  
Fubo Zhao ◽  
Shuai Ma ◽  
Yiping Wu
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Water Availability ◽  
Yellow River ◽  
Yellow River Basin ◽  
Dry Season ◽  
The Yellow River ◽  
Water Fluxes ◽  
Resources Management ◽  
The Yellow River Basin

Global warming will significantly change patterns of precipitation (P) and evapotranspiration (E) and thus the surface water availability (P minus E, P–E). Changes in P–E will challenge freshwater supply, food security, and sustainability of the ecosystems. Therefore, understanding the spatiotemporal change in P–E and its drivers is key for water resources management. Here, we quantified the changes in water availability during the driest month of the year and identified its drivers in the Yellow River Basin (YRB), China, during 1982–2016. Our results showed that 89.6% of the YRB showed declining dry-season water availability in 2000–2016 compared with 1982–1999, although the total dry-season water resources (defined as the proportion of the sum of monthly P–E to the P) remained nearly unchanged due to the increased P. Changes in seasonal P and E contributed to 87.0 and 99.0% declines in dry-season water availability, respectively, demonstrating the key role of E in net seasonal water fluxes. Increased air temperature (41.8%), vegetation greening (30.8%), and vapor pressure deficit (19.2%) were the main factors driving changes in E in the YRB during the study period. Our study highlighted a drier dry season in the YRB during 1982–2016 and illustrated that climate and vegetation changes played important roles in driving changes in dry-season water availability. Seasonal water fluxes must be considered in future water resources management in the YRB, especially in the context of climate warming and revegetation programs.

scholarly journals Outorgas Superficiais na Sub-Bacia Hidrográfica do Rio São Domingos, Pinheiros/ES / Grant Suface at Hydrographic Sub-Basin River São Domingos, Pinheiros/ES

2018 ◽  
Vol 28 (52) ◽  
pp. 125
Author(s):  
Jonatha Liprandi Jaques ◽  
André Luiz Nascentes Coelho
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Water Availability ◽  
Sustainable Management ◽  
The State ◽  
Federal Law ◽  
Espírito Santo ◽  
Resources Management ◽  
Methodological Tool ◽  
Espirito Santo

<p>O aumento da demanda pelos recursos hídricos tem colaborado para um cenário de conflitos decorrentes do uso da água em diferentes espaços geográficos e que vêm crescendo gradualmente no Estado do Espírito Santo. A Política Nacional e Estadual de Recursos Hídricos, instituída pela Lei Federal n° 9.433/1997 e a Lei Estadual do Espírito Santo 10.179/2014, constituiu a outorga nas condições de disponibilidades hídricas, pois fornece o limite máximo permissível, por prazo determinado para todos os usuários outorgados. Sendo assim, a presente pesquisa tem como objetivo avaliar em detalhes os processos de outorgas e as denúncias de irregularidades relativas ao uso de recursos hídricos na sub-bacia hidrográfica do rio São Domingos, localizada no município de Pinheiros – ES. Empregando como instrumento metodológico o uso de sistemas de informações geográficas (SIGs), com o propósito de identificar os processos de outorgas e as áreas de conflitos. Os resultados demonstraram que o uso de irrigação é predominante no número de outorgas. Consta-se a grande importância de um manejo sustentável para o uso de irrigação.</p><p><strong>Palavras-chave</strong>: Gestão de Recursos Hídricos; Instrumento de Gestão de Recursos Hídricos; Disponibilidade Hídrica; Conflitos de Usos de Recursos Hídricos.</p><p><strong>Abstract         </strong></p><p>The increase in demand for water resources has contributed to a scenario of conflicts arising from the use of water in different geographic spaces and that have been growing gradually in the State of Espírito Santo. The Hydric Resources National and State Politian, created by the Federal Law number 9.433/1997 and the State Law number 10.179/2014, constitute the grant under the conditions of water availability, as it provides the maximum permissible limit for a fixed term for all the users granted. Thus, the present research aims to evaluate in detail the granting processes and complaints of irregularities related to the use of water resources in  the São Domingos river basin, located in the municipality of Pinheiros – ES. Using as a methodological tool the use of geographic information systems (GIS), with the purpose of identifying the granting processes and the areas of conflicts. The results show that the predominant use of water is to irrigation as presented by number of grant. It is the importance of sustainable management for the use of irrigation is high.</p><p><strong>Keywords</strong>: Hydric Resources Management; Water Resources Management Instrument; Water Availability; Conflicts of Uses of Water Resources.</p>

scholarly journals Selection of a Hydrological Model and Objective Function for Water Resources Management in Predominantly Rural Watershed using Criteria-Based Evaluation

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Pratik Singh Thakuri ◽  
NT Sohan Wijesekera
Keyword(s):  
Water Resources ◽  
Objective Function ◽  
Water Resources Management ◽  
Hydrological Modeling ◽  
Hydrological Model ◽  
Suitable Model ◽  
Hydrological Models ◽  
Objective Functions ◽  
Resources Management ◽  
Selection Of

Selection of a fitting up-to-date hydrological model using an evaluation of the functionality, modeler’s requirements, and modeling experiences are very important for water resources management in rural watersheds. Similarly, the selection of appropriate objective function is equally crucial in hydrological modeling processes. Accordingly, A review study was carried to select an appropriate model and objective function for water resources modeling in the predominantly rural watershed. Hydrological models namely HEC-HMS, MIKE SHE, SWAT, TOPMODEL, and SWMM, and objective functions namely NSE, RMSE, MRAE, and RAEM were reviewed. Hydrological models were reviewed under several criteria viz. temporal scale, spatial scale, hydrological processes, documentation, resources requirement, user interface and, model acquisition cost. Whereas, criteria for the review of objective functions were mathematical implication, flow regime, and modeling purpose. Each of the review criteria was comprised of several factors. The criteria-based evaluation was done to quantify the review outcome of the hydrological model and objective function. SWMM was found to be the most suitable model for simulating rural watersheds for water resources management purposes whereas, MRAE was found to be the most appropriate objective function to evaluate the performance of the model selected for rural watershed modeling.

scholarly journals Machine Learning with Metaheuristic Algorithms for Sustainable Water Resources Management

2021 ◽  
Vol 13 (15) ◽  
pp. 8596
Author(s):  
Ozgur Kisi
Keyword(s):  
Machine Learning ◽  
Water Resources ◽  
Solar Radiation ◽  
Water Resources Management ◽  
Hydrological Cycle ◽  
Rainfall Runoff ◽  
Resources Management ◽  
Hydrological Parameters ◽  
Sustainable Water Resources Management ◽  
Sustainable Water Resources

Management of available water resources needs good planning and to do this, prognostication of hydrological parameters (parameters of the hydrological cycle such as rainfall, runoff, solar radiation, groundwater, evaporation/evapotranspiration) [...]

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