Thesis from WMO Fellowship Division
Thesis from the WMO Fellowship Division
For several decades, through its fellowship programme, WMO has trained many experts from developing countries. Highly commendable theses/dissertations have been prepared by these fellows in partial fulfillment of requirements for their post-graduate studies.
Given the limited information available to experts and students alike on issues related to meteorology, hydrology and allied disciplines we wish to share as much research related information as possible, through the WMO online library, on the work of the postgraduate fellows. Hence, this online dissemination of excerpts of theses/dissertations prepared by WMO fellows.
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Based on Global Precipitation Climatology center (GPCC) precipitation data and Era-Interim Zonal and Meridional wind, relative humidity, Sea Level Pressure and Sea surface temperature data from ECMWF, Statistical methods were conducted to find out the interannual variability of rainfall and its dynamic factors in AGLR from 1981 to 2016. The results show that there are two (long and short) rainfall seasons over AGLR, MAM and OND respectively. The empirical orthogonal function was used to reveal through the dominant principal components (PC1) of the first EOF, the extreme years (wet and dry) for ...EnglishPublished by: College of Atmospheric Science ; 2019
Spatial/Temporal Distribution of Rainfall and the Dynamic Factors Associated over African Great Lakes Region from 1981 to 2016
Based on Global Precipitation Climatology center (GPCC) precipitation data and Era-Interim Zonal and Meridional wind, relative humidity, Sea Level Pressure and Sea surface temperature data from ECMWF, Statistical methods were conducted to find out the interannual variability of rainfall and its dynamic factors in AGLR from 1981 to 2016. The results show that there are two (long and short) rainfall seasons over AGLR, MAM and OND respectively. The empirical orthogonal function was used to reveal through the dominant principal components (PC1) of the first EOF, the extreme years (wet and dry) for both MAM and OND. Since previous analysis have shown that OND rainfall has high variability than the long rainy season MAM, further analysis (composite analysis) was conducted to investigate the dynamic factors behind the extreme (wet and dry) years for OND season. Results of composite analysis suggest that the Indian Ocean SST regulates the precipitation over the study area; warm SST influences the wind circulation resulting in an upward motion of warm air due to convergence of wind during wet years and the contrary is observed during dry years.
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Format: DigitalThe Food and Agriculture Organization (FAO) defined that the suitability is a function of crop climate requirements and land characteristics and it is a measure of how will the qualities of land unit matches the requirements of a particular form of land use. The aim of this research is to improve maize production in the lowlands of Lesotho, this is one of the agro-ecological zones with the most arable land and good soils so it is best to determine the suitability of each crop across this region. This will be achieved by quantitatively and qualitatively looking at the climate conditions require ...EnglishPublished by: Nanjing University of Information Science & Technology ; 2019
The Food and Agriculture Organization (FAO) defined that the suitability is a function of crop climate requirements and land characteristics and it is a measure of how will the qualities of land unit matches the requirements of a particular form of land use. The aim of this research is to improve maize production in the lowlands of Lesotho, this is one of the agro-ecological zones with the most arable land and good soils so it is best to determine the suitability of each crop across this region. This will be achieved by quantitatively and qualitatively looking at the climate conditions required by maize and also looking at the physio-chemical soil properties that suffices for the maximum production of the crop.
Climatic potential of maize under dryland farming in the lowlands of Lesotho was investigated using five climatic suitability indices namely: probability of receiving heat units of greater than 1320GDD, probability of a frost-free growing season, probability of seasonal rainfall of more than 650mm and the slope of an area. Also the physio-chemical properties of the soils found in the area of study were investigated looking at 6 soil parameters (pH, porosity, permeability, infiltration, organic matter, moisture equivalence) which are crucial to maize growth. For each of the above parameters a coverage layer was prepared in GIS environment and the layers were overlaid to obtain the agro-climatic suitability map of maize in the lowlands of Lesotho. Weighted overlay method is used for suitability analysis. The spatial analysis show that suitable soils are distributed throughout the whole lowlands but they are highly concentrated in the middle parts of the lowlands and with water requirement, the north-most part of the lowlands is highly suitable while the central part is moderately suitable.
The overall maize suitability in the lowlands of Lesotho indicate that 45.7% of the area is moderately suitable and this are concentrated in the middle to northern lowlands. 49.3% of the lowlands are found to be suitable for maize growth and are distributed throughout the whole lowlands but with the highest concentration in the north-most parts. Of the 5% remaining only 4.3% is highly suitable and it some area in the central part of Maseru near Moshoeshoe-I station.
Future projections show that there will be an improvement of growing degree days across the whole lowlands due to an increase in temperature but as of water requirement satisfaction there is a notable change of reduction especially in Mafeteng and Moshoeshoe-I this is due to reduction in annual accumulated rainfall, this is the case for both two (RCP 4.5, RCP 4.5) scenarios undertaken in this study.
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Format: DigitalThe conference provides an opportunity for students especially PhD students to present their work and get feedback from other professionals. Not only that but the it also offers an excellent chance for networking among aspiring scientists and the possibility for future collaborations.EnglishPublished by: University of Reading ; 2017
Evaluation of subseasonal prediction of extreme rainfall events and their relationship with the Madden Julian Oscillation over the Solomon Islands
The conference provides an opportunity for students especially PhD students to present their work and get feedback from other professionals. Not only that but the it also offers an excellent chance for networking among aspiring scientists and the possibility for future collaborations.
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Format: Digital (Free)EnglishPublished by: 월 이화여자대학교 대학원 기후·에너지시스템공학과 ; 2017
Improving the Quantitative Precipitation Forecast (QPF) over Ghana using WRF Interfaced with Genetic Algorithm
Format: DigitalEnglishPermalinkRainfall is a very important weather and climate parameter that affects social and economic activities in Djibouti. This leads to droughts, floods and humanitarian disasters over the country. The rainfall climatology of the country has some changes which need to be taken into account while planning for economic activities such as civil and structural engineering. The whole country receives significant rains in the months of (October – December) and (March – April) as known except for the southern parts of the country. The southern part of the country gets its rains in the months of (June to Au ...EnglishPermalinkFloods and droughts are one of extreme weather climatic events that result in loss of life and property in Malawi. However, a well detailed knowledge of understanding of previous extreme climatic events and their associated impacts can be a precautionary in reducing their impacts, as it will help to project future events timely. Therefore this paper presents an analysis of Dec-Feb seasonal flood/drought events and their associated circulation anomalies over Malawi. The DJF seasonal flood/drought was studied using monthly data from 9 selected stations for the period of 1978-2010. A set of regio ...EnglishPermalinkAs we know tropical intraseasonal oscillation (ISO) was described as 2 modes such as Boreal summer intraseasonal oscillation (BSISO) during boreal summer and Madden-Julian Oscillation (MJO) dominates during boreal winter. In summer time, Thailand where located at the coastal region at the Equator which is effected by BSISO. Some week there is strong diurnal cycle but some week is opposite. The purpose of this work is to study the evolution of BSISO and to study the change of diurnal precipitation in different phases of BSISO. Tropical Rainfall Measuring Mission (TRMM) version 3B42 data on 0.25 ...EnglishPermalinkAgriculture is the largest employer in the world and is probably the most dependent on the climate of all human activities. In recent years there have been events that have put in evidence the vulnerability of global food security to major meteorological phenomena, both in global agricultural markets and the world economy. The food price crisis and the subsequent economic crisis reduced the purchasing power of large segments of the population in many developing countries, which seriously reduced their access to food and thus undermined their food security. During the years 2009 and 2010 in Ven ...EnglishPermalinkClimate is one of the key factors that affect agriculture. Climate change and climate variability have been observed, typically shown as global warming due to the increased greenhouse gases. The change in climate is even predicted to be rapped and sharp in recent future and the impacts of extreme climate condition associated with climate change will be high on agriculture. Studying the impacts of climate change, especially the effects of temperature and precipitation on agriculture, is important for food safety, agricultural management, and sustainable development.EnglishPermalinkDans ce travail nous avons voulu étudier sur la zone tropicale les liens entre les systèmes convectifs et la pluie. L’algorithme TOOCAN introduit a pour but d’améliorer la caractérisation de l’évolution du bouclier nuageux associe aux systèmes convectifs au cours de leur cycle de vie. Des composites des structures précipitantes au cours du cycle de vie du système nuageux organise sont alors construits en fusionnant les données des satellites géostationnaires avec des estimations de précipitations issues des mesures micro-ondes à bord des satellites défilant. L’objectif de ce travail est non se ...FrenchPermalinkThis study attempted to investigate the variability of extreme rainfall and temperature over Rwanda and the associated circulation anomalies forecasting on wet and dry rainfall events between 1961 and 2010. The datasets used to achieve the objectives includes Temperature, the rainfall dataset, wind vector, pressure vertical velocity (omega) and the Indian Ocean sea surface temperature (SST). The methods used include correlation analysis, Standardized anomaly, composite analysis, and Empirical Orthogonal Functions (EOF) analysis. The results show that the mean annual cycle depict two rainy Seas ...EnglishPermalinkWhile drought conditions are generally a common and recurring phenomenon of the climate in Southern Africa especially Lesotho, the frequency of droughts in Lesotho has increased significantly over the past few years. Lesotho has suffered the devastating impacts of drought during the past several decades resulting in poor harvests and large livestock losses to rural farmers. The majority of the population in Lesotho engages with rain- fed agriculture and is dependent to some degree on own production for household food supply and/or cash income (Dejene, Midgley, & Marake, 2011). Any negative cha ...EnglishPermalinkFog though a rare event has adverse economic implications to both the airline and aviation service providers if it’s occurrence, duration and dissipation periods are not properly predicted. This work assesses the accuracy and skill in forecasting fog events and suggesting possible adjustments to improve forecast accuracy and skill. The forecast used in this study are produced by MeteoGroup using Model Output Statistics (MOS). Forecasts for Heathrow, Northolt and Kenley are considered for analysis. These forecasts are used by British Airports Authority (BAA) in planning airport operations. The ...EnglishPermalinkThe rainy season in Sierra Leone is unimodal from April to October; an understanding of the inter-annual variability of rainfall in Sierra Leone is of importance to economic sectors such as fisheries, agriculture, infrastructure, hydro-electric power generation (HEP) and water resources. This study investigated the variation of the intra-seasonal rainfall characteristics in Sierra Leone. Daily rainfall data from 4 synoptic stations was obtained from the Sierra Leone Meteorological Department from 1990-2014.EnglishPermalinkTo apprehend the temporal and spatial distribution of the rainfall over CAR, we computed thirty-three years (1981-2013) of monthly rainfall, relative humidity over the country divided into four (4) distinct sub-regions. Bearing different characteristics one to another, we found that Region 2 and Region 4 were having a statistical significant upward trend along the long term rainfall variation; meanwhile Region 3 was the one having a highest coefficient of variation on the yearly basis. The composite analysis showed that December, January and February were the months with higher frequency of va ...EnglishPermalinkEnglishPermalinkThis study investigates spatial and temporal features of the West African Summer Monsoon (WASM) and its relation to the Sea Surface Temperature Anomaly (SSTA). The variability of the WASM from June to September was analyzed during the period 1960-2013, with methods including EOF analysis of the precipitation anomaly and SSTA and the associated large scale circulation pattern. The result from the first EOF-Mode of the precipitation anomaly which has the highest positive loadings over the region shows that during the summer, the precipitation anomalies are positives in the Sahel and the Sahara. ...EnglishPermalinkThe Sahel drought mechanism: insights from two contrasting extreme events during boreal summer July-August-September (JAS) is investigated in this study using the standardized precipitation index (SPI). Empirical orthogonal function (EOF) and composite analyses were deployed in this study, where the global precipitation climatology center (GPCC) rainfall data is used. The SPI shows large widespread decreasing rainfall trend in the Sahel in the mid-1980s; thereafter, Sahel rainfall have recovered somewhat through the late 1990s, even though the drought conditions have not ended in the region. A ...EnglishPermalinkGlobal climate change is remarkably changing the climatic patterns of the Pearl River basin and are significantly impacting the hydrological processes. Projection of future climate change impacts on steamflow variation is potential to provide scientific guidelines for sustainable water resources management and effective prevention and control for flood and drought disasters. In this study, a hydrological modeling system for assessing climate change impacts on runoffin the Pearl River basin was established and were used to simulate historical hydrological process and to project future streamflo ...EnglishPermalinkThis research investigates the dynamical and thermodynamical process of mesoscale convective system that intensifies squall lines wind speed propagation. The generation of African Easterly Waves (AEWs) and its lifecycle. The characteristics of squall lines (SLs) over West Africa (WA) which occurred In Guinea for two cases periods June 01-02 and June 13-14, 2015. In all six (6) AEWs have been tracked using reanalysis data from European Centre for Medium-Range Weather Forecasts (ECMWF). European Meteorological Satellite images (EUMETSAT) and Earth Networks WeatherBug StreamerRT were also used to ...EnglishPermalinkFor Zimbabwe, where rain fed agriculture is the backbone of the economy, the importance of accurate rainfall seasonal forecasts cannot be overemphasized (Makarau and Jury, 1997). In fact, extremes in interseasonal variability of rainfall can significantly complicate human livelihoods. In addition, there have been predictions of increased precipitation variability and hydro-meteorological hazards such as floods, droughts, and erratic rainfall due to global warming (Field et al., 2014; Mushore, 2013a). Thus, detailed understanding of the major contributors to the rainfall variability over Zimbab ...EnglishPermalinkThe current study is an attempt to assess meteorological drought in Myanmar during the South west pre monsoon and monsoon period using observed rainfall data from 34 stations in Myanmar spanning from 1971 to 2010. The components of drought that were analyzed in this study were severity, persistence, frequency and probability of occurrence. Additional, trends in drought occurrence were analyzed using the Mann-Kendall (MK) method while the wavelet analysis was applied to PI value to identify various periodic processes.EnglishPermalinkThe variability and predictability of summer rainfall over Zimbabwe at inter-annual time scale is studied. Dry and wet seasons are identified using Zimbabwe Standardized Rainfall Index (ZRI). Seasonal rainfall and circulation patterns are investigated at inter annual time scale. The study focuses on the temporal and spatial variation of summer rainfall over Zimbabwe and tries to explain the circulation mechanisms associated with such phenomenon.EnglishPermalinkThe southern coastal region of West Africa (SCWA) is located between 40N-80N latitudes and 100W -50E longitudes near the equator in the northern Hemisphere, the south and west are respectively equatorial and West Atlantic Ocean, and it is consisted to seven countries (Sierra Leon, Liberia, Cote d’Ivoire, Ghana, Togo, Benin and Nigeria). The rainy season starts from spring to the summer, mainly from May to October. The rainfall is very important for southern coastal of West Africa region which their economy and food supply are highly dependent on agricultural production. Understanding of previo ...EnglishPermalinkPrecipitations vary consistently in Benin from 1981 to 2010. The present study reveals that the variation of Benin JJAS precipitation is positively correlated to MAM Sea Surface Temperature (SST) in Atlantic Ocean with correlation coefficient more than 0.7. When the SST is higher (lower) in the Atlantic Ocean, precipitation over Benin tends to be above (below) normal. The years 1988, 1989, 2003, 2007 and 2008, were wet with 1988, 2003, 2008 high SST over Tropical Southern Atlantic Ocean (STAO) while the years 1982, 1983, 1992 and 1997 formed the dry years with low SST over Tropical Southern At ...EnglishPermalinkThis paper examines the aerosol extinction coefficient profiles measured by Rayleigh-Raman-Mie-Lidar (RRML) system in Nanjing, China. I introduced two lidars methods (Raman and Fernald) and detection principle, and two lidars data Using Raman analysis method and Fernald analysis method to obtained aerosol extinction coefficient. Aerosol profiles at 607 nm and 532 nm over ranges from 6 km to 10 km were obtained using respectively Raman lidar and Rayleigh lidar in Nanjing.EnglishPermalinkAerosols are small, micrometer-sized particles, whose optical effects coupled with their impact on cloud properties is a source of large uncertainty in climate models. Aerosols when inhaled are believed to have significant and detrimental effects on human health. Their presence also affects photosynthesis and agricultural production. Aerosol measurements are urgently required for the complete understanding and modeling their role in the climate system. This study builds on the analysis of Aerosol Optical depth (AOD) using Light Detection and Ranging (LIDAR) and sun photometer measurements then ...EnglishPermalinkDroughts pose a major risk in most African countries including Ghana where agricultural activities are heavily dependent on rainfall. Efforts at assessing droughts and providing decision support tools to farmers are hampered by a lack of rainfall and other meteorological data over many parts of Africa. Satellite based rainfall measurements have been suggested to fill the rainfall data gaps over Africa to enable effective assessment of droughts. Traditional methods of assessing droughts have been based on statistical formulations that relied mostly on precipitation. This approach to assessing d ...EnglishPermalinkIn urban climate research, spatial and temporal variability of precipitation is always a critical element for numerical modelling. However, the effects of temporal resolution of precipitation forcing data has received little attention. Moreover, there has always been a difference practically and theoretically in the availability of precipitation data. This study was carried out to assess the impact of temporal resolution of precipitation forcing data on the modelled surface energy and water balance using available data from a site at the Strand campus of Kings College London. Analysis has been ...EnglishPermalinkForecasting heavy rainfall associated with in-situ convective cloud development over small island states is a challenge in operational forecasting as not all numerical models are able to resolve convection at such small scales. Forecasting of such phenomena is mainly based on prevailing local conditions and the use of a plethora of thermodynamic indices derived from the local sounding. This study is an effort to assess the suitability of the different available indices, hereafter referred as traditional indices, to forecast heavy rainfall from local convection, commonly known as pure sea breez ...EnglishPermalinkAerosols in the atmosphere serve as condensation nuclei for the cloud formation. This brings an important influence on the microphysical properties of cloud water that in turn affect the processes in the formation of precipitation. Aerosol-cloud-precipitation interaction which simultaneously change cloud albedo interest many studies to find out aerosol impact on precipitation formation. The studies were done by observation measurement and simulation. UK Met Office Unified Model (UM) is one model that includes aerosol direct and indirect effect in the NWP configuration which leads to study aero ...EnglishPermalinkThis study attempts to reveal features of rainfall over Togo, in relationship to the
prevailing atmospheric circulation. The study employed correlation analysis and composite analysis in
the analysis of rainfall, sea surface temperature, wind, and humidity. Empirical orthogonal functions
(EOF) analysis was employed in this study. The years: 1989, 1991, 1995, 2003 and 2007 were
identified to be anomalously wet years while 1982, 1983, 1990, 1992, 2001 and 2006 fall in the
anomalously dry years’ category. The dominant mode of variability exhibits a dipole patter ...EnglishPermalinkThe attachment took place at the ECMWF headquarters in Reading, United Kingdom from 29th April-30th July 2013. The program was sponsored by the World Meteorological Organisation (WMO).EnglishPermalinkAbongnwi Ngwa Lumfuh - 2014Adverse weather is the main cause of the alterations to operations at Wilson airport. At Wilson airport, occurrence of fog and low ceiling, cross winds, thunderstorm and heavy rainfall are considered the main causes of adverse weather hampering the aircraft operations. The purpose of this study is to investigate the impacts of fog and thunderstorm on aircraft operations at Wilson airport. The impact is measured in terms of delay, diversion, cancelation and economic value of these actions. The data on fog and thunderstorm data was obtained from Kenya Meteorological Service (Climatological secti ...EnglishPermalinkMafuru Kantamla Biseke - College of Atmospheric Science, Nanjing University of Information Science and Technology, 2013Tanzania is one among the most other sub-Sahara African countries where Agriculture production is strongly depending on rainfall, a key factor which determine the livelihood of 70% of the total population. An adequate amount of rainfall per season reasonably help the farmer to accomplish his/her goal in a positive way, while an excessive amount of rainfall impacts on both people’s livelihood and agricultural production leading into reduction in manpower and nation’s GDP. In recent years, Tanzania suffered a successive scenario of heavy rainfall over different areas of the country, the majority ...EnglishPermalinkTemperature and rainfall are important elements of climate Zambia where several sectors of the economy depend mostly on water resources. Zambia normally receives the bulk of its annual rainfall from November to March (NDJFM) as the ITCZ moves south and experience high temperatures. The major objective of the study was to investigate the rainfall and temperature characteristic over Zambia.EnglishPermalinkEnglishPermalinkBuzzella Maria Mercedes; Institute of Water Resources Management, Hydrology and Agricultural Hydraulic Engineering - Leibniz Universität, 2013Precipitation data is the main input parameter in order to simulate rainfall-runoff processes, since it is strongly dependent on the accuracy of the spatial and temporal representation of the precipitation. In regions where rainfall stations are scarce, additional data sources may be considered necessary. In this manner, remote sensing from satellite platforms has provided a satisfactory alternative due to its global coverage. Although a wide range of satellite-based estimations of precipitation is available, not all the satellite products are suitable for all regions. Most of the studies perf ...EnglishPermalinkNkongolo-Tshimanga David; Institut hydrométéorologique de formation et de recherches - République Algérienne Démocratique et Populaire, 2012EnglishPermalink“The dominant pattern of Burundi rainfall is the seasonal move of the dominant Intertropical convergence zone (ITCZ), the Congo air mass and the interconnection with EL Nino/Southern oscillation (ENSO) phenomena. Much of Burundi experiences a bimodal seasonal distribution of rainfall with maxima occurring in the March- April and November. The Interannual variability of rainfall in Burundi shows interesting association with atmospheric and oceanic phenomena. We investigate the variability of rainfall using OND (October, November, December) and MAM (March, April, May) precipitation in Burundi du ...EnglishPermalinkUganda is located between latitudes 1.5 0 S to 4.5 0 N and longitudes 28o E to 35 0 E. It contains complex topography that includes large Lakes, Rivers, Great Rift Valley and Mountains, and supports varied wildlife of scientific and economic value. Due to its Equatorial location, this country is expected to receive abundant rainfall throughout the year. This is, however, not the case as frequent occurrences of years of insufficient rainfall for agricultural activities have been observed. Rainfall over Uganda exhibits large spatial and temporal variability. The inter-annual variability has feat ...EnglishPermalinkApart from the northern coast, most of Egypt is desert. However, the northern coastal region experiences some precipitation mainly during winter. We investigate the variability of wintertime (December, January and February) precipitation in North Egypt during the 30-yr interval 1976-2005 and its relationship with the North Atlantic Oscillation during winter and subtropical jet stream.EnglishPermalinkLe travail présenté ci-après se base sur la nouvelle version du modèle climatique global CNRM-CM5 développé conjointement par le CNRM-GAME et le CERFACS dans le cadre de l'exercice d'intercomparaison CMIP5 en vue du prochain rapport du GIEC. Il est utilisé ici en mode prévision décennale pour étudier la réponse du système climatique aux forçages externes sur la période 2010-2035. Ces forçages sont de 3 natures: forçages solaire, anthropique et volcanique et on les étudie ici de manière individuelle.FrenchPermalinkMany studies carried out have shown evidence of regional temperature and precipitation variability along with global climate changes. A key issue is whether these variability follow trends that are uniform or others have increasing trends while others decreasing trend. And this study was carried out using Mann-Kendall trend test method and regression analysis method with the data observed by a total of 20stations to investigate the trends of temperature and precipitation in northern China. 10stations were selected from urban areas (section 1.4.2: table 1.1) and another 10stations were selected ...EnglishPermalinkFloods are a threat to many cities especially in the developing countries and cities found near the coastal areas where the population pressure, unplanned settlements and poor infrastructures are most evident. Climate change also poses a higher flood risks in these areas due to increased frequency and intensity of extreme rainfall events. In this study analysis of extreme rainfall over Dar es Salaam city in Tanzania was done. The analysis employed empirical as well as hydrological frequency modeling to annual maximum daily rainfall events for 5 of the meteorological stations found within the c ...EnglishPermalinkRainfall products from operational algorithms like the TAMSAT and the NOAA CPC African Rainfall Estimate are being used for many diverse meteorological, climatological, hydrological, agricultural, and other applications. It is therefore important to have an idea of their accuracy and expected error characteristics. This is done by validating the satellite precipitation estimates against "ground truth" from rain gauge observations. One of the biggest challenges in generating real time climate information for decision support is monitoring rainfall performance over the western region of Uganda, ...EnglishPermalinkThe effects of global environmental change, including coastal flooding stemming from storm surges as well as reduced rainfall in drylands and water scarcity, have detrimental effects on countries and megacities in the costal regions worldwide. Among these, Bangladesh with its capital Dhaka is today widely recognised to be one of the regions most vulnerable to climate change and its triggered associated impacts. Natural hazards that come from increased rainfall, rising sea levels, and tropical cyclones are expected to increase as climate changes, each seriously affecting agriculture, water & fo ...EnglishPermalinkParaguay is a very rich country in water resources, owing to generous rainfall regime, very favorable weather conditions and has significant water resources development potential. To promote planning and development of water resources in the country, systematic studies are required to understand stream flow behavior. The present study is therefore, undertaken to study the stream flow behavior in the Nacunday river basin using the SWAT Model. The Nacunday river basin is predominantly agricultural watershed with soybean as main crop which is grown under no tillage practices and can be considered ...EnglishPermalink