Exploring temporal dynamics of spatially-distributed groundwater levels by integrating time series modeling with geographic information system

2019 ◽  
pp. 1-21
Author(s):  
Deepesh Machiwal ◽  
P. C. Moharana ◽  
Sanjay Kumar ◽  
Vandita Srivastava ◽  
Subhash L. Bhandari
2021 ◽  
Vol 6 (1) ◽  
pp. 40
Author(s):  
Ifeyinwa Sarah Obuekwe ◽  
Umar Saleh Anka ◽  
Sodiq Opeyemi Ibrahim ◽  
Usman Ahmad Adam

The coronavirus disease 2019 (COVID-19) is caused by a new strain of coronavirus that spreads primarily by close contact. Although Nigeria adopted lockdown measures, no defined strategies were used in setting the distance threshold for these lockdowns. Hence, understanding the drivers of COVID-19 is pivotal to an informed decision for containment measures in the absence of vaccines. Spatial and temporal analyses are crucial drivers to apprehending the pattern of diseases over space and time. Thus, this study aimed to quantify the significance of distance to the temporal dynamics of COVID-19 cases in Nigeria using the Geographic Information System. Incremental spatial autocorrelation was used to analyze datasets of each month in ArcGIS. March, April, May, and June exhibited patterns with no significant peaks, while July and August exhibited patterns with two statistically significant peaks. The first and second peaks of July were 301,338.39 and 365,947.83 meters, respectively, while August was 301,338.39 and 336,128.09 meters, respectively. Therefore, a significant difference in the clustering of COVID-19 over distances between July and August was established. This indicated that progression in the spread of the virus increased the virus's spatial coverage while the distance of risk of exposure decreased. This study's findings could be utilized to establish maximum movement restriction areas to contain the spread of COVID-19. Keywords: Distance; Incremental spatial autocorrelation; Covid-19; Disease; Nigeria Copyright (c) 2021 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License


2014 ◽  
Vol 70 (3) ◽  
pp. 495-501 ◽  
Author(s):  
S. E. Lee ◽  
S. H. Kang

Spatially distributed sediment delivery (SEDD) models are of great interest in estimating the expected effect of changes on soil erosion and sediment yield. However, they can only be applied if the model can be calibrated using observed data. This paper presents a geographic information system (GIS)-based method to calculate the sediment discharge from basins to coastal areas. For this, an SEDD model, with a sediment rating curve method based on observed data, is proposed and validated. The model proposed here has been developed using the combined application of the revised universal soil loss equation (RUSLE) and a spatially distributed sediment delivery ratio, within Model Builder of ArcGIS's software. The model focuses on spatial variability and is useful for estimating the spatial patterns of soil loss and sediment discharge. The model consists of two modules, a soil erosion prediction component and a sediment delivery model. The integrated approach allows for relatively practical and cost-effective estimation of spatially distributed soil erosion and sediment delivery, for gauged or ungauged basins. This paper provides the first attempt at estimating sediment delivery ratio based on observed data in the monsoon region of Korea.


2019 ◽  
Vol 9 (2) ◽  
pp. 187-194
Author(s):  
Sofia Scăunaș ◽  
C. Păunescu ◽  
G.-L. Merciu

Abstract The paper topic is related to the use of Geographic Information System and remote sensing in analysing the spatio-temporal dynamics of a post-socialist city. The purpose of this study is to highlight the changes in the land use of the Băneasa neighbourhood, located in the northern part of the capital city of Romania. The changes have been analysed from the nineteenth century to the present. The authors used historical mapping using old maps, as well as digitizing aerial photographs using the Geographic Information System. There has been an accelerated territorial evolution in the last 70 years, marked by the impact of the socialist policy of intensive urbanization, when the urban-type systematization was applied through the construction of collective dwellings, to which were added some important industrial units. After 1990, the dynamics of the tertiary sector generated significant changes in the physiognomy of the urban landscape, observing the increase of the built space (commercial spaces, new residential areas) at the expense of green spaces, tree nurseries, greenhouses and industrial sites. The most recent stage of evolution, however, has brought the most profound changes in the landscape of the Băneasa district, as a result of the new political and socio-economic context, marked by the collapse of communism. Thus, in the last 30 years, the capital city has registered an uncontrolled urban growth dynamic, this being characteristic of other large urban centres at the national level as well favoured by less strict, inconsistent and incomplete urban legislation.


2020 ◽  
Vol 52 (4) ◽  
pp. 89-65
Author(s):  
NATALYA V. LITOVKA ◽  
◽  
TAMARA L. VIDOVSKAYA ◽  

This article examines the geographic information system of an oil and gas production enterprise, designed for integrated monitoring of a field and individual oil wells. To solve logistical problems that are relevant both during the operation of existing fields and in the construction of new areas, it is proposed to refine the geographic information system using the method of optimal placement of objects of a spatially distributed complex. One of the promising applications of the geographic information system, which qualitatively increases the efficiency of its use, is its use as part of automatic identification systems and automated synthesis of systems for optimal digital control of spatially distributed dynamic objects.


Groundwater becomes mandatory in day-to-day routine life without any limitation; we were using groundwater for irrigation, domestic and industrial needs. Unlimited groundwater pumping has decreased groundwater levels in some areas of the review region. The purpose of this document is to present the description of the outlet points of the river basin. This document explains the method of revealing the DEM-based basin outlet point. With Geographic Information System (GIS) support, river boundary basins and drainage areas are discharged into an area where a pumping station can be installed in the Ottanchatram district of Dindigul, Tamilnadu. To provide easy flow of wastewater to a treatment plant or river basin. Using an environmental GIS hydrology module, the watersheds for Ottanchatram taluk have been illustrated. The result of this experiment indicates that this method can effectively solve the problem of parallel routes and the main channel out of its natural position. In flat, mountain and landscape areas this method can reveal pour point by using DEM.


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