An Integrated Hydrological Model for Water Balance Estimation in the Chirchik River Basin, Northern Uzbekistan (original) (raw)
Related papers
Applied Water Science, 2024
The numerical modeling of the land surface can make up for the insufficient station data in terms of number, dispersion, and temporal continuity. In this research, to evaluate the Noah-MP land surface model, the water balance components were estimated in the Neyshaboor watershed in the monthly time step during 2000-2009. Model input data were obtained from the global land data assimilation system version 1 (GLDAS-1), and the SWAT (soil and water assessment tool, a semi-distributed for small watershed to river basin-scale model) model output was used for the evaluation of the Noah-MP model. In this study, the ability of the Noah-MP model in simulating vegetation dynamically was studied. The precipitation was corrected before running the model for a more reliable evaluation. The time between 2000 and 2001 was considered a spin-up period and 2002-2009 for calibration and validation. The model has the best simulation in the mountainous areas; the runoff simulated by the Noah-MP model is in good agreement with the modeled runoff by SWAT in these areas. (R 2 = 0.78, NSE = 0.62, RMSE = 1.98 m 3 /s). The R 2 for simulated soil moisture for soil layers (0-10, 10-40 cm) was 0.62 and 0.57, and RMSE was 0.059 (m 3 /m 3) and 0.052 (m 3 /m 3), respectively, in Motamedieh field. The annual amount of evapotranspiration estimated by the two models is comparable to the average annual evapotranspiration in the watershed (about 300 mm). Based on the results from the research, the model has well simulated: the runoff in the mountainous areas, the moisture in the upper layer of the soil, and the average annual evapotranspiration in the study area.
Assessment of Water Balance for Russian Subcatchment of Western Dvina River Using SWAT Model
Frontiers in Earth Science
The study provides a new assessment of the water balance components of the catchment (evapotranspiration, surface and lateral flow etc., and its spatial distribution and temporal variability) for the transboundary catchment of Western Dvina river within the poorly gaged Russian part of the catchment. The study focuses on modeling the inland flow generation processes using open source data and the SWAT (Soil Water Assessment Tool) hydrological model. The high interannual variability of river flow and impact of snowmelt processes were especially taken into account when setting up the model and processing the calibration. The database of daily meteorological data for the period 1981-2016 was prepared using global atmospheric reanalysis ERA-Interim data and observed station data from the GSOD NCDC/NOAA and ECA&D datasets. The considered datasets were tested on plausibility and regionalized. The catchment model was built on the basis of open land use/land cover (LULC) data sets, topography and soil, so that the entire transboundary catchment area could be easily implemented in the next step. For the daily model calibration, 19 sensitive parameters were chosen manually. The most sensitive are the parameters which consider snow melting processes and flow recession curve number. The area and distribution of wetlands have the highest impact on water balance components. Lakes strongly affect the evapotranspiration rate. The study provides further research with uncertainty analysis and recommendations for model improvement and model limitations. The developed modeling approach can be used to assess water resources, climate change impacts, and water quality issues in comparable regions.
Model-based water accounting for integrated assessment of water resources systems at the basin scale
Science of the Total Environment, 2022
Agricultural activities in the concept of integrated water resources management play a vital role. Especially in dry and semi-dry regions, agricultural activities have the largest share of water consumption. By employing a model-based approach using modified Soil and Water Assessment Tool (SWAT agro-hydrological model), this study has prepared Water Accounting Plus (WA+) framework requirements to investigate different conditions of supply and demand in wet (1985–2000) and dry (2001–2015) periods in a semi-dry basin (Karkheh River Basin) in Iran. Our assessments based onWA+show decreasing 10%(21.65 to 19.29 Billion Cubic Meters (BCM)/year) of precipitation in the dry period caused a 4% (0.13 BCM/year) decline in natural evapotranspiration. However, the basin experienced a 24% increment in evapotranspiration from agricultural activities at the same period, and runoff was approximately halved (2.45 BCM/year). Therefore, especially in downstream parts, surface water withdrawal has decreased by 18%. These new conditions have put pressure on groundwater resources. The aquifer extraction and total withdrawal for irrigation have grown by about 17% and 4%, respectively. Finally, it is evident that the manageable water has diminished due to climate change; not only the managed water consumption in the basin has not reduced, but it has also highly risen. The current study results help water authorities arrange new hydrological and climatic conditions strategies.
Water balance calculation capability of hydrological models
Acta Agraria Kaposváriensis
Currently, in the world, there are many different hydrological models built and developed to solve problems related to the hydrological cycle. Each model has its specific mathematical foundations to describe physical processes in nature. Therefore, each model has its various characteristics: setting up the model, input data requirements, model calibration and verification, and output results. Water balance is still playing an important role in the effective management and use of water resources for agriculture. Based on the results of the hydrological parameter’s calculation, the water balance of the study basin can be calculated by the user or by the separated module of each model. Each hydrological models have its advantages and disadvantages. However, it is impossible to simulate hydrological processes and water balance completely accurately in nature. Still, simulation results can give us a view of the changing trend of hydrological components and the water balance. Model develo...
OLOGY ASSESSMENT OF WATER BALANCE OF A WATERSHED USING SWAT MODEL FOR WATER RESOURCES MANAGEMENT
An attempt has been made in this study to assess the hydrological behavior of the Kurumali sub basin of Karuvannur river basin using SWAT model and other geospatial technologies. All the thematic maps and attribute information of the watershed have been collected from various Government agencies. SWAT model has been set up for the Kurumali sub basin by inputting the digital thematic maps, physical properties of soil and climatic parameters. Total area of the watershed corresponding to the outlet chosen at Kurumali is 423 km 2 and its elevation varies from 10 to 650 m. Six different land use and eight soil types were present in the catchment. Calibration and validation of the model have been done by comparing the river flow prediction with the observed values. Nash Sutcliff Efficiency (NSE) and coefficient of determination (R 2) has given very high values for the calibration (0.88 and 0.96) and validation (0.90 and 0.99) periods respectively. The calibrated model has been used to predict the important hydrologic processes viz. surface runoff, lateral flow, base flow and ET and it was found that base flow amounts to 64 %, lateral flow 12 % and surface runoff 9 % of the annual rainfall. The study has revealed that SWAT model can effectively be used in the simulation of river flow and for predicting the water balance of a river basin in the humid tropic. Water balance information of the basin is of great use in planning water conservation, drainage and flood control. INTRODUCTION The components of water balance of a basin are influenced by climate, the physical characteristics of the watershed such as morphology, landuse and soil. Understanding the relationship between these physical parameters and hydrological components are very essential for any water resources development related work. Since the hydrologic processes are very complex, their proper comprehension is essential and for this watershed models are widely used. This study utilises the capability of SWAT model in analysing the water balance components of ahumid tropic watershed in the Indian peninsular region. The most important hydrologic elements from the water management point of view are surface runoff, lateral flow, baseflow and evapotranspiration. There are a number of integrated physically based distributed models. Amoung them, researchers have identified SWAT as the most promising and computationally efficient (Neitsch et al., 2005). Hence, in this study, an attempt has been made to study calibration, validation of the SWAT model and to determine the important hydrologic components of a river basin with focus on water conservation and management. The specific objective of the study lies in assessing the water balance component of a humid tropic river basin to make water resources planning and management more objectively.
ESTIMATING THE WATER BALANCE COMPONENT IN RANGMATI RIVER BASIN USING SWAT MODEL
It is necessary to understand the quantity and quality in space and time to utilize water resources in a sustainable manner. The soil and water assessment tool (SWAT) is used for estimating water balance component. The total 518 km 2 area of river basin was subdivided into 7 sub watershed and 230 hydrologic response units (HRUs). The average of mean seasonal and annual water balance component showed that seasonal rainfall, seasonal runoff, seasonal groundwater recharge and seasonal ground water recharge was found increasing at 75.65 mm/decade, 47.32 mm/decade, 10.91 mm/decade and 12.10 mm/decade respectively while seasonal potential evapotranspiration and annual potential evapotranspiration was found as decreasing at 4.76 mm/decade and 2.71 mm/decade respectively.
Water balance model development and application in a closed drainage basin
2000
The Fayoum basin of Egypt is a closed basin with a lack of natural drainage outlets. In order to assess alternative water management scenarios, a basinscale model was developed and tested, simulating water balances in the Fayoum basin and Lake Qaroun under present conditions. The model can simulate and evaluate the effect of some water management options such as the increase in drainage water reuse and the improvement of water distribution with time. The model results were evaluated with respect to measured Lake Qaroun water levels in 1980-1996. By comparing values computed for five statistical parameters, the predicted water levels were deemed to be in accord with measured values. The monthly modeling efficiency (EF) ranged from 0.65 to 0.91. On an annual basis. EF was estimated to 0.89. Based on the performance of the system during 1992-1996, it was concluded that, due to a mismatch between supply and demand either in time or in place, 12% of the intake water was not used effectively (for evapotranspiration and leaching) and was lost as surface runoff to the lower reaches of the system. The performance of the system could be improved by increasing the volume of water pumped by reuse stations and/or improving the water intake with time.
Hydrological Modelling in the Ouergha Watershed by Soil and Water Analysis Tool
Journal of Ecological Engineering
Streamflow modelling is crucial for developing successful long-term management, soil conservation planning, and water resource management strategies. The current work attempts to develop a robust hydrological model that simulates streamflow with the slightest uncertainty in the calibration parameters. A physical-based and semidistributed hydrological SWAT model was employed to assess the hydrological simulation of the Ouergha watershed. The monthly simulation of the SWAT model achieved in the time frame from 1990 to 2013 has been split into warm-up (1990-1996), calibration (1997-2005), and validation (2006-2013). The SUFI-2 algorithm's preliminary sensitivity and uncertainty analysis was done to calibrate the model using 11 hydrologic parameters. The model's performance and robustness findings are promising. To evaluate the model, the coefficient of determination (R 2), Nash-Sutcliffe efficiency (NSE), and percent of bias (PBIAS) were utilized. The value of R 2 , NSE, and PBIAS ranged from 0.45-0.77, 0.6-0.89, and +12.72 to +21.89% during calibration and 0.51-0.85, 0.64-0.88, and +8.82 to +22.19% during validation period, respectively. A high correlation between the observed and simulated streamflow was recorded during the calibration and validation periods. More than 68% of the observation data are encompassed by the 95PPU across both the calibration and validation intervals, which is excellent in terms of the P-factor and R-factor uncertainty criterion. The projected streamflow matches the observed data well graphically. According to the total hydrological water balance study, 29% of precipitation is delivered to streamflow as runoff, whereas 54% of precipitation is lost through evapotranspiration. The recharge to the deep aquifers is 8%, whereas the lateral flow is 10%. The findings of this study will help as a roadmap for the anticipated water management activities for the basin since the management and planning of water resources require temporal and spatial information.
Water balance of Gorganrood river basin East of Iran
AFRICAN JOURNAL OF AGRICULTURAL RESEEARCH, 2011
Recent development of geographic information system (GIS) and remote sensing technology makes it possible to capture and manage a vast amount of spatially distributed hydrological parameters and variables. In this paper, a spatially distributed hydrologic model (WetSpa) is used to estimate daily river flow discharge and to analyze water balance of the Gorganrood river basin, Iran. The model combines topography, landuse and soil maps to predict discharge hydrographs and spatial distribution of hydrological parameters. For each grid cell the model holds water balance in the root zone by determination of soil moisture changes due to continues changes in infiltration of precipitation, runoff, initial absorption, evaporation transpiration, interflow, and percolation to the groundwater zone. The model gives all flow components at any cell, including surface flow, interflow and groundwater flow. The results show that the model is capable in reproducing water balance and its components. They also demonstrate the changes in the water balance during last two decades.