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I am a Water Engineer and Researcher with 10+ years of cumulative professional experience, having worked in the fields of water resources, agriculture, irrigation, construction, environmental engineering, and climate change research areas. My research interests are in water resources management, hydrological modeling, and climate change. Currently, I am conducting a Ph. research on "Effects of agricultural activities on water quality: Analysis of nutrient export and management"
Agricultural activities contribute to water pollution through sediments and nutrient export, negatively affecting water quality and aquatic ecosystems. However, implementing best management practices (BMPs) could help control sediments and nutrient losses from agricultural catchments. This study used the Soil Water Assessment Tool (SWAT) model to a...
The expansion of agricultural lands in the Thiba River watershed, particularly in the Mwea Irrigation Scheme and other parts of the watershed, has resulted in excessive water abstraction from the Thiba River, thereby reducing its flow and affecting its downstream users. This study aimed to evaluate the potential impacts of the expansion of agricult...
Predicting water quality and quantity response to climate change in a watershed is very difficult due to the complexity and uncertainties in estimating and understanding future hydrological conditions. However, hydrological models could simplify the processes and predict future impacts of agricultural activities. This study aimed to evaluate the ap...
The conversion of cultivated areas from rainfed to irrigated agriculture alters the watershed’s hydrology and could affect the water quality and quantity. This study examined how streamflow, nitrate load, and nitrate concentration changed after irrigation implementation in a Mediterranean watershed in Navarre, Spain. The Soil Water Assessment Tool...
The Soil Water Assessment Tool (SWAT) model was used to simulate streamflow in the Cidacos River in Navarra. SWAT could help in predicting future hydrological impacts due to agricultural land use changes, such as the transformation from rainfed to irrigated agriculture. The model's suitability was assessed by carrying out parametrization, sensitivi...
Pan-African University (PAU) is an initiative of the African Union Commission (AUC) that started in 2008 with the objective to promote higher education, science and technology on the African continent at a high academic level. The Pan-African University Institute of Water and Energy Sciences (including Climate Change) (PAUWES) is one of the five hu...
Despite their imperative role in water resources management, distributed hydrological models like SWAT require calibration that can be challenging due to uncertainties of parameters involved. Prior to modelling of hydrological processes, these parameters and their uncertainty range need to be identified. The objective of this study was to conduct u...
Soil and water conservation measures are widely practiced in Kenya to tackle the degradation of the ecosystems and to improve land productivity. Local government and NGOs have developed programs and campaigns about soil and water conservation measures. The aim of this study is to assess the need for soil and water conservation measures in ThikaChan...
I am facing a challenge with the classification of my soil data in order to help create the usersoil database. My soil data was developed using the USDA classification system but I now have to convert it to the FAO code so as to match those provided in the SWAT2012 database to help generate the usersoil table. Could someone explain to me what the second and last numbers in the code are and where I can obtain it. E.g Af32-2ab-3, Be49-3c-20
The first letters represents the dominant soils, Ferric Acrisol (Af) or Eutric Cambisol (Be), the third figure is the soil texture class (1-coarse, 2-medium, 3-fine), the small leters indicate the slope class (a- level to undulating; b- rolling to hilly; c-steeply dissected to mountainous)
What does the second figure of 32 or 49 and the last figure of 3 or 20 represent in the code and where can I obtain them?
Secondly, is there an alternative way to create the usersoil table without using the FAO database, could anyone kindly share any useful resources in this regard?
Thanks in advance!