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The effect of reforestation on stream flow in Upper Nan river basin using Soil and Water Assessment Tool(swat)model

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International Soil and Water Conservation Research 2013年第2期1卷 53-63页

作者： Winai Wangpimool Kobkiat Pongput Chinnapat Sukvibool Samran Sombatpanit Philip W.Gassman Department of Water Resources Engineering Faculty of EngineeringKasetsart LniversityBangkok 10900Thailand Land Development Department BangkokThailand World Association of Soil and Water Conservation(WASWAC) BangkokThailand and BeijingChina Center for Agricultural and Rural Development lowa State Lniv.AmesIowaUSA

Forests are an important natural resource,vital to all *** are an important source of food,clothing,and medicines,as well as a place to *** released from forests drains into the soil causing groundwater to emerge as stream flow throughout the *** Thailand,most forests have been encroached by logging,paper production,and housing *** growth and the need for farming area for crop and livestock production have also caused forest *** tools are needed to support the decision makers and planners if they are to achieve objectives of water conservation,and *** technical tools are needed for assistance in the engineering,socio-economic,and environmental *** Soil and Water Assessment Tool(swat)was used in the hydrological modeling in this study of the complex and dynamic problems of The Upper Nan river *** was a case study to evaluate the impact of changing conditions in the river basin affected by the stream flow due to *** watershed area was delineated into 5 sub-watersheds based on surface topography provided by the Digital Elevation model(DEM)and the parameters of each of these watersheds were *** land use data was processed and reclassified to match with the swat model land use *** different categories of land use in the study area were used for swat *** of land use consist of:mixed forest(33.7%),disturbed forest(30.2%),evergreen forest(17.7%),paddy field(7.1%),orchard(3.7%),range brush(2.7%),field crop(1.7%),planted forest(1.7%),urban(1.4%)and water resources(0.4%).Twenty-two types of soil were found in the *** initial curve number values were assigned based on the land use type and soil hydrologic group for the average antecedent moisture condition of the curve number *** potential evapotranspiration was computed using the Penman-Monteith *** simulation was performed using three reforestation scenarios to assess stream f

关键词： Reforestation Stream flow swat model Upper Nan river basin Thailand

Water yield and biomass production for on a eucalypt-dominated Mediterranean catchment under different climate scenarios

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林业研究:英文版 2023年第5期34卷 1263-1278页

作者： Joao Rocha Ana Quintela Dalila Serpa Jan Jacob Keizer Sérgio Fabres RAIZ-Forest and Paper Research Institute Quinta de S.FranciscoRua JoséEstevao(EN 230-1)3800–783 EixoAveiroPortugal Department of Environment and Planning Centre of Environmental and Marine Studies(CESAM)University of AveiroCampus Universitário de Santiago3810–193 AveiroPortugal

Worldwide,forests are vital in the regulation of the water cycle regulation and in water balance *** of ecohydrological responses of production forests is essential to support management strategies,especially where water is already *** climatological patterns are expected to impact thermopluviometric regimes,water cycle components,hydrological responses,and plant physiology,evapotranspiration rates,crop productivity and land management *** work(1)assessed the impacts of different predicted climate conditions on water yield;(2)inferred the impacts of climate change on biomass production on eucalypt-to-eucalypt succes *** this end,the widely accepted Soil and Water Assessment Tool(swat)was run with the RCA,HIRHAM5 and RACMO climate models for two emission scenarios(RCP 4.5 and8.5).Three 12-year periods were considered to simulate tree growth under coppice *** results revealed an overall reduction in streamflow and water yield in the catchment in line with the projected reduction in total annual ***,HIRHAM5 and RACMO models forecast a slight shift in seasonal streamflow of up to 2 months(for2024-2048)in line with the projected increase in precipitation from May to *** biomass production,the extreme climate model(RCA)and severe emis sion scenario(RCP 8.5)predicted a decrease up to 46%.However,in the less extreme and more-correlated(with actual catchment climate conditions)climate models(RACMO and HIRHAM5)and in the less extreme emission scenario(RCP 4.5),biomass production increased(up to 20%),and the growth cycle was slightly *** was proven to be a valuable tool to assess climate change impacts on a eucalypt-dominated catchment and is a suitable decision-support tool for forest managers.

关键词： Climate scenarios Forested catchments Forest ecohydrological modelling Eucalypt biomass production swat model

Influence of climate change on hydrological process in the upper reaches of Shiyang River:A case study of the Xiying River,China

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寒旱区科学:英文版 2023年第3期15卷 141-149页

作者： DongDong Qiu GuoFeng Zhu Xi Zhao WenHao Zhang LiYuan Sang YuWei Liu XinRui Lin ZhuanXia Zhang ZhiGang Sun HuiYing Ma College of Geography and Environment Science Northwest Normal UniversityLanzhouGansu 730070China Shiyang River Ecological Environment Observation Station Northwest Normal UniversityLanzhouGansu 730070China Lanzhou Branch Remote Sensing Application CenterMinistry of Agriculture and Rural AffairsLanzhouGansu 730070China Key Laboratory of Resource Environment and Sustainable Development of Oasis Gansu ProvinceLanzhouGansu 730070China State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100091China

Climate change is the dominant factor affecting the hydrological process, it is of great significance to simulate and predict its influence on water resources management, socio-economic activities, and sustainable development in the future. In this paper, the Xiying River Basin was taken as the study area, China Atmospheric Assimilation Driven Data Set(CMADS) and observation data from the Jiutiaoling station were used to simulate runoff of the swat model and calibrate and verify model parameters. On this basis, runoff change of the basin under the future climate scenario of CMIP6 was predicted. Our research shows that:(1) The contribution rates of climate change and human activities to runoff increase of the Xiying River are 89.17% and 10.83%, respectively. Climate change is the most important factor affecting runoff change of the Xiying River.(2) In these three different emission scenarios of SSP1-2.6, SSP2-4.5 and SSP5-8.5 in CMIP6 climate model, the average temperature increased by0.61, 1.09 and 1.74 C, respectively, in the Xiying River Basin from 2017 to 2050. Average precipitation increased by 14.36, 66.88, and 142.73 mm, respectively, and runoff increased by 15, 24, and 35 million m3, *** effect of climate change on runoff will continue to deepen in the future.

关键词： Upper reaches swat model Runoff simulation CMIP6 CanESM5

Integrating water use systems and soil and water conservation measures into a hydrological model of an Iranian Wadi system

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Journal of Arid Land 2020年第4期12卷 545-560页

作者： Nariman MAHMOODI Jens KIESEL Paul D WAGNER Nicola FOHRER Department of Hydrology and Water Resources Management Institute for Natural Resource ConservationKiel UniversityKiel 24118Germany Department of Ecosystem Research Leibniz-Institute of Freshwater Ecology and Inland Fisheries(IGB)Berlin 12489Germany

Water resources are precious in arid and semi-arid areas such as the Wadis of Iran. To sustainably manage these limited water resources, the residents of the Iranian Wadis have been traditionally using several water use systems(WUSs) which affect natural hydrological processes. In this study, WUSs and soil and water conservation measures(SWCMs) were integrated in a hydrological model of the Halilrood Basin in Iran. The Soil and Water Assessment Tool(swat) model was used to simulate the hydrological processes between 1993 and 2009 at daily time scale. To assess the importance of WUSs and SWCMs, we compared a model setup without WUSs and SWCMs(Default model) with a model setup with WUSs and SWCMs(WUS-SWCM model). When compared to the observed daily stream flow, the number of acceptable calibration runs as defined by the performance thresholds(Nash-Sutcliffe efficiency(NSE)≥0.68, –25%≤percent bias(PBIAS)≤25% and ratio of standard deviation(RSR)≤0.56) is 177 for the Default model and 1945 for the WUS-SWCM model. Also, the average Kling–Gupta efficiency(KGE) of acceptable calibration runs for the WUS-SWCM model is higher in both calibration and validation periods. When WUSs and SWCMs are implemented, surface runoff(between 30% and 99%) and water yield(between 0 and 18%) decreased in all sub-basins. Moreover, SWCMs lead to a higher contribution of groundwater flow to the channel and compensate for the extracted water by WUSs from the shallow aquifer. In summary, implementing WUSs and SWCMs in the swat model enhances model plausibility significantly.

关键词： swat model stream flow Wadis multi-metric framework water use systems soil and water conservation measures Halilrood Basin

Determination of water balance equation components in irrigated agricultural watersheds using swat and MODFLOW models:A case study of Samalqan plain in Iran

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Journal of Groundwater Science and Engineering 2022年第1期10卷 44-56页

作者： Shima Nasiri Hossein Ansari Ali Naghi Ziaei Water science and Engineering College of AgricultureFerdowsi University of MashhadIran

Increasing water demands,especially in arid and semi-arid regions,continuously exacerbate groundwater as the only reliable water resources in these *** watershed,Iran,is a groundwater-based irrigation watershed,so that increased aquifer extraction,has caused serious groundwater *** that the catchment consists of surface water,the management of these resources is essential in order to increase the groundwater *** to the existence of rivers,the low thickness of the alluvial sediments,groundwater level fluctuations and high uncertainty in the calculation of hydrodynamic coefficients in the watershed,the swat and MODFLOW models were used to assess the impact of irrigation return flow on groundwater recharge and the hydrological components of the *** this purpose,the irrigation operation tool in the swat model was utilized to determine the fixed amounts and time of irrigation for each HRU(Hydrological Response Unit)on the specified *** the study area has pressing challenges related to water deficit and sparsely gauged,therefore,this investigation looks actual for regional scale *** evaluation criteria,RMSE and NRMSE for the simulated groundwater level were 1.8 m and 1.1%***,the simulation of surface water flow at the basin outlet,provided satisfactory prediction(R^(2)=0.92,NSE=0.85).Results showed that,the irrigation has affected the surface and groundwater interactions in the watershed,where agriculture heavily depends on *** 11.64 Mm3 water entered to the aquifer by surface recharge(precipitation,irrigation),transmission loss from river and recharge wells 5.8 Mm3 and ground water boundary flow(annually 20.5 Mm^(3)).Water output in the watershed included ground water extraction and groundwater return flow(annually 46.4 Mm^(3))and ground water boundary flow(annually 0.68 Mm^(3)).Overally,the groundwater storage has decreased by 9.14 Mm3 annually in Samalqan *** method can be appl

关键词： Groundwater level swat model MODFLOW model Recharge Irrigation

Sediment balances in the Blue Nile River Basin

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International Journal of Sediment Research 2014年第3期29卷 316-328页

作者： Yasir S.A.ALI Alessandra CROSATO Yasir A.MOHAMED Seifeldin H.ABDALLA Nigel G.WRIGHT UNESCO-IHE Westvest 72601 DA Delftthe Netherlands and Hydraulics Research CenterMinistry of Water Resources and ElectricityP.O.Box 318Wad MedaniSudan UNESCO-IHE Westvest 72601 DA Delft and Profat Hydraulics Research CenterMinistry of Water Resources and Electricity School of Civil Engineering University of LeedsFaculty of EngineeringLeeds LS2 9JT.United Kingdom Water Resources Technical Organ Ministry of Water Resources and ElectricityKhartoumSudan UNESCO-IHE Westvest 72601 DA Delft and Research Associate at Civil Engineering and Geosciences Delft University of TechnologyStevin weg 12628 CN Delftthe Netherlands

Rapid population growth in the upper Blue Nile basin has led to fast land-use changes from natural forest to agricultural *** resulted in speeding up the soil erosion process in the highlands and increasing sedimentation further downstream in reservoirs and irrigation *** present,several dams are planned across the Blue Nile River in Ethiopia and the Grand Ethiopian Renaissance Dam is currently under construction near the border with *** will be the largest hydroelectric power plant in *** objective of this paper is to quantify the river flows and sediment loads along the Blue Nile River *** Soil and Water Assessment Tool was used to estimate the water flows from un-gauged *** assess model performance,the estimated sediment loads were compared to the measured ones at selected *** the gauged sub-basins,water flows and sediment loads were derived from the available flow and sediment *** fill in knowledge gaps,this study included a field survey in which new data on suspended solids and flow discharge were collected along the Blue Nile and on a number of *** comparison between the results of this study and previous estimates of the sediment load of the Blue Nile River at El Deim,near the Ethiopian Sudanese border,show that the sediment budgets have the right order of magnitude,although some uncertainties *** gives confidence in the results of this study providing the first sediment balance of the entire Blue Nile catchment at the sub-basin scale.

关键词： Blue Nile basin Sediment balance Field data Rating curve swat model

Water resources response and prediction under climate change in Tao'er River Basin,Northeast China

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Journal of Mountain Science 2021年第10期18卷 2635-2645页

作者： SUN Jia-qi LI Hong-yan WANG Xiao-jun SHAHID Sliamsuddin College of Hydrology and Water Resources Hohai UniversityNanjing 210098China Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Research Center for Climate Change Ministry of Water ResourcesNanjing 210029China School of Civil Engineering Faculty of EngineeringUniversiti Teknologi Malaysia(UTM)81310Johor BahruMalaysia

Climate change has significantly affected hydrological processes and increased the frequency and severity of water shortage,droughts and floods in northeast China.A study has been conducted to quantify the influence of climate change on the hydrologic process in the Tao’er River Basin(TRB),one of the most prominent regions in northeast China for water *** Soil and Water Assessment Tool(swat)model was calibrated and validated with observed land use and hydro-climatic data and then employed for runoff simulations at upper,middle and lower reaches of the river basin for different climate change *** results showed that a gradual increase in temperature and decrease in annual precipitation in the basin was projected for the period 2020-2050 for both representative concentration pathways(RCP)4.5 and 8.5 *** climate changes would cause a decrease in annual average runoff at basin outlet by 12 and 23 million m^(3) for RCP4.5 and 8.5,*** future runoff in the upstream and midstream of the basin during 2020-2050 would be-10.8% and-12.1% lower than the observed runoff compared to the base period for RCP4.5,while those would be-5.3% and-10.7%lower for *** future runoff will decrease at three hydrology stations for the assumed future climate *** results can help us understand the future temperature and precipitation trends and the hydrological cycle process under different climate change scenarios,and provide the basis for the rational allocation and management of water resources under the influence of future climate change in the TRB.

关键词： Hydrological process simulation Climate change Climate scenario model swat model Tao’er River Basin

Impacts of forestation on the annual and seasonal water balance of a tropical catchment under climate change

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Forest Ecosystems 2021年第4期8卷 856-871页

作者： Hero Marhaento Martijn J.Booij Noorhadi Rahardjo Naveed Ahmed Faculty of Forestry Universitas Gadjah MadaYogyakarta 55281Indonesia Water Engineering and Management Group Faculty of Engineering TechnologyUniversity of TwenteP.O.Box 2177500 AE Enschedethe Netherlands Faculty of Geography Universitas Gadjah MadaYogyakarta 55281Indonesia Key Laboratory of Mountain Surface Process and Ecological Regulations Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China

Background:This study aims to assess the effects of a forestation program and climate change on the annual and seasonal water balance of the Bogowonto catchment(597 km^(2))in Java,*** catchment study is rare example in Indonesia where forestation has been applied at the catchment ***,since the forestation program has been initiated,evaluations of the program only focus on the planting area targets,while the environmental success e.g.,impacts on the hydrological processes have never been *** study used a calibrated Soil and Water Assessment Tool(swat)model to diagnose the isolated and combined effects of forestation and climate change on five water balance components,namely streamflow(Q),evapotranspiration(ET),surface runoff(Q_(s)),lateral flow(Q_(l))and base flow(Q_(b)).Results:The results show that from 2006 to 2019,forest cover has increased from 2.7% to 12.8% of the total area,while in the same period there was an increase in the mean annual and seasonal temperature,rainfall,and *** of swat simulations show that changes in the mean annual and seasonal water balance under the forestation only scenario were relatively minor,while changes were more pronounced under the climate change only *** on the combined impacts scenario,it was observed that the effects of a larger forest area on the water balance were smaller than the effects of climate ***:Although we found that forestation program has minor impacts compared to that of climate change on the hydrological processes in the Bogowonto catchment,seasonally,forestation activity has decreased the streamflow and surface runoff during the wet season which may reduce the risk of moderate ***,much attention should be paid to the way how forestation may result in severe drought events during the dry ***,we urge the importance of accounting for the positive and negative effects in future forestation programs.

关键词： Forestation Land use change Climate change swat model Water balance Bogowonto catchment

Effects of Finer Scale Soil Survey and Land-Use Classification on swat Hydrological modelling Accuracy in Data-Poor Study Areas

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Journal of Water Resource and Protection 2022年第2期14卷 100-125页

作者： Verenice Escamilla-Rivera Sergio Cortina-Villar Raúl A. Vaca Duncan Golicher José Arellano-Monterrosas Jordi Honey-Rosés Patagonian Institute for the Study of Continental Ecosystems IPEEC-CONICET-CENPAT Puerto Madryn Argentina Center for Demographic Urban and Environmental Studies El Colegio de México A.C. Mexico City Mexico Department of Agriculture Society and Environment El Colegio de la Frontera Sur San Cristóbal de Las Casas Mexico National Council of Science and Technology El Colegio de San Luis (CONACYT-COLSAN) San Luis Potosí Mexico Department of Life and Environmental Sciences Bournemouth University Dorset United Kingdom National Water Commission CONAGUA Mexico City Mexico Institute for Environmental Science and Technology Universitat Autonoma de Barcelona (ICTA-UAB) Barcelona Espa&ntilde a Institute for Resources Environment and Sustainability (IRES) The University of British Columbia Vancouver Canada

The limited availability of high-quality spatial data often limits the development of hydrological modelling in developing countries. Hydrological models with data at different scales may generate large uncertainties in modelling outputs. This study analysed the accuracy of four swat built models that combine soil and land use/land cover (LULC) data at the scale of 1:250,000 and 1:100,000 in a basin of Mexico. swat model allowed determining that large-scale maps produced better results than data from small-scale. Sensitivity analysis with different soil data was less than LULC data. However, the small-scale can be used for exploratory purposes when testing swat performance.

关键词： Map Scale swat model Soil Survey Land Use/Land Cover Mexico