Background: Global climate change and its impact on crop water requirement have widely discussed in recent years. In the present century, climate change had become a significant concern and atmospheric temperature is the dominant climatic factor that indicates the changes in both regional and global scales. This study was undertaken to evaluate the trend and predict the changes in crop water requirement under various climate change scenarios. Methods: The statistical nonparametric Mann-Kendall test and Sen’s slope used to identify trend in the data series. In this study ArcGIS V. xx software used for investigating spatial patterns in data. CROPWAT-8.0 model used for calculation of crop water requirement under various climate change scenarios. Total six climate change scenarios were considered for assessment.Result: The crop water requirement (ETc) of pigeonpea estimated and exhibited an increasing trend and a decreasing trend in study area in the past 35 years. The spatial distribution maps reveal that the distribution of ETc is found an increasing trend in all the scenarios to reference ETc. An increasing trend of ETc of pigeon pea was observed in all the places under various climate change scenarios. It was suggested to promote rainwater harvesting, soil and water conservation and increase ground water recharge in the study area to minimize the risk of yield reduction due to the availability of minimum water under changing climatic condition.
Accurate wind power estimates (based on variable wind speeds) are necessary for successful planning and investment in wind power development. In order to inform the development of wind energy, it is essential to acquire a trustworthy quantification and spatiotemporal characteristics of wind speeds. This research used the ArcGIS, Mann-Kendall (MK) test, and Sen's slope to analyze long-term wind speed data from 7 stations in the Kalaburgi District, North Eastern Region of Karnataka State, from 1981 to 2018. The findings of this study contribute to our knowledge of how wind speeds in Kalaburgi District vary and are distributed over long time scales. Over 35 years, there has been a slight and steady rise or decrease in the average wind speed (aveWS). Second, over a span of about 35 years, the annual aweWS varied greatly at various points within the Kalaburgi District. Additionally, the annual aveWS at each station showed a rising tendency. Last but not least, values of wind speeds varied geographically were not very consistent throughout the year, and gradually decreased.
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