The objective of this work is to present an update to the daily precipitation gridded set developed by Xavier, King and Scanlon (2016), where the previous dataset is namely v2 and the new one is v2.1. The v2.1 gridded data uses 9,259 rain gauges relative to 3,630 in v2. We also extend the period of the gridded data by two years (v2.1 is from Jan/01/1980 to Dec/12/2015 while v2 is from Jan/01/19...

We looked into the problem that the quantitative values of 123I data vary according to collimator type. First, we made the assumption that the quantitative values of 123I data are degraded by the scattered photons from the 529 keV component which contaminate the 159 keV imaging data. Then, the 123I Dual Window (IDW) method was proposed to improve the quantitative values of the 123I data. The ID...

so far several methods have been developed for mapping and interpolation of isohyets.one of the recently accepted methods is geographically weighting regression which is suitable for evaluation of spatial heterogeneity of dependent variable by using local regressions. in order to evaluate annually precipitation spatial variation, this study was conducted in gilan province which precipitation is...

Traditional inverse distance weighting (IDW) interpolation is a process employed to estimate unknown values based on neighborhoods in 2D space. Proposed this study an improved IDW method that uses 3D search for effective vertically connected observation data, such as water level, depth, and altitude. Borehole data are the collected by subsurface boring activities exhibit heterogeneous spatial d...

Precipitation is a key variable in the hydrological cycle and essential input data rainfall-runoff modeling. Rain gauge are considered as one of best sources precipitation but before further use, must be spatially interpolated. The process interpolation particularly challenging over mountainous areas due to complex orography usually sparse network rain gauges. This paper investigates two determ...

Muğla province, which is located in Southwest Anatolia and has a surface area of 13,338 km2, generally mountainous rough terrain. In this study, it aimed to map analyze the distribution monthly annual maximum minimum average temperature values province by using Inverse Distance Weighted (IDW) interpolation method. For purpose, meteorological data 13 stations General Directorate Meteorology Gölh...

A better understanding of spatial distribution groundwater level is necessary for the development strategies and sustainable use available resources. The present study evaluates over Morang Administrative District Eastern Nepal accessibility area. was realized by performing an extensive field survey during post-monsoon season 126 sites. area 1224.80 km2 gridded at 3 km x horizontal grid resolut...

This paper presents an efficient parallel Adaptive Inverse Distance Weighting (AIDW) interpolation algorithm on modern Graphics Processing Unit (GPU). The presented algorithm is an improvement of our previous GPU-accelerated AIDW algorithm by adopting fast k-nearest neighbors (kNN) search. In AIDW, it needs to find several nearest neighboring data points for each interpolated point to adaptivel...