Spatial and temporal trends of precipitation and temperature for the MPUAT service area, Rajasthan, India

Abstract

The present study focuses on the long term trends of meteorological parameters like precipitation and temperature of the MPUAT service area, Rajasthan, India which is mainly located in humid and sub-humid region. Trend analysis of the seasonal (pre-monsoon, monsoon, post-monsoon and winter) and annual daily rainfall and temperature at the spatial and temporal scales was carried out for 7 stations of the MPUAT, service area. Statistical trend analysis technique, namely the Mann–Kendall test, was used to examine trends (1984– 2014) at the 5% level of significance. Both positive and negative trends were observed in both seasonal and annual events of rainfall and temperature.The spatial variations of the trends in seasonal (pre-monsoon, monsoon, post-monsoon and winter) and annual daily rainfall and temperature were also determined using the inverse-distance-weighted (IDW) interpolation technique. IDW results are helpful to identify trends and variability in seasonal and annual rainfall and temperature in space and time for the study locations where the data is not available and the quality of data is not good. These spatial maps of temperature and rainfall can aid in designing the effective water resources planning over the MPUAT service area under climate change.