scholarly journals Study on Water Resource Change of Dongjiang River over the Past 50 Years

2014 ◽  
Vol 03 (01) ◽  
pp. 66-71
Author(s):  
波 张
Keyword(s):  
Water Resource ◽  
The Past ◽  
Dongjiang River

scholarly journals Climatic controls on watershed reference evapotranspiration vary dramatically during the past 50 years in southern China

2017 ◽  
Author(s):  
Mengsheng Qin ◽  
Lu Hao ◽  
Lei Sun ◽  
Yongqiang Liu ◽  
Ge Sun
Keyword(s):  
Climate Change ◽  
Resource Management ◽  
Water Resource ◽  
Air Temperature ◽  
Water Resource Management ◽  
Reference Evapotranspiration ◽  
Southern China ◽  
The Past ◽  
Increasing Trend ◽  
The Individual

Abstract. Reference evapotranspiration (ETo) is an important hydrometeorological term widely used in water resource management, hydrological modeling, and understanding and projecting the hydrological effects of future climate change and land use change. Identifying the individual climatic controls on ETo helps better understand the processes of global climatic change impacts on local water resources and also simplify modeling efforts to predict actual evapotranspiration. We conducted a case study on the Qinhuai River Basin (QRB), a watershed dominated by a humid subtropical climate and mixed land uses in southern China. Long term (1961–2012) daily meteorological data at six weather stations across the watershed were used to estimate ETo by the FAO-56 Penman−Monteith model. The seasonal and annual trends of ETo were examined using the Mann−Kendall nonparametric test. The individual contributions from each meteorological variable were quantified by a detrending method. The results showed that basin-wide annual ETo had a decreasing trend during 1961–1987 due to decreased wind speed (WS), solar radiation (Rs), vapor pressure deficit (VPD), and increased relative humidity (RH). These variables had different magnitudes of contribution to the ETo trend in different seasons examined during 1961−1987. However, during 1988–2012, both seasonal and annual ETo showed an increasing trend, mainly due to increased VPD and decreased RH and, to lesser extent, to decreased absolute humidity (AH) and a rising air temperature. We show that the key climatic controls on ETo have dramatically shifted as a result of global climate change during the past five decades. Now the atmospheric demand, instead of air temperature alone, is a major control on ETo. Thus, we conclude that accurately predicting current and future ETo and hydrological change under a changing climate must consider changes in VPD (i.e., air humidity and temperature) in the study region. Water resource management in the study basin must consider the increasing trend of ETo to meet the associated increasing water demand for irrigation agriculture and domestic water uses.

The Edwards Aquifer: The Past, Present, and Future of a Vital Water Resource

2019 ◽  
Author(s):  
John M. Sharp ◽  
Ronald T. Green ◽  
Geary M. Schindel
Keyword(s):  
Water Resource ◽  
Edwards Aquifer ◽  
The Past

Crossing the River: Home and Exile at the River Jordan

Hydrofictions ◽  
2020 ◽  
pp. 31-68
Author(s):  
Hannah Boast
Keyword(s):  
Twentieth Century ◽  
Water Resource ◽  
Short Story ◽  
The Past ◽  
Early Twentieth Century ◽  
Palestinian Literature ◽  
Sense Of Home

This chapter identifies the River Jordan as a major feature of Israeli and Palestinian environmental imaginaries. It argues that the Jordan’s role as a water resource and a contested border gives it crucial material and symbolic functions in imagining the past, present and future of the Israeli and Palestinian nations. The first half examines the meanings of the Jordan to early twentieth-century Zionist ‘pioneers’, including its role in cultivating a sense of home and belonging. The second half identifies representation of the Jordan as dried-up or polluted as a strategy used in recent Palestinian literature to depict Palestinian exile. Texts examined include Moshe Smilansky’s short story ‘Hawaja Nazar’ (1910), Mahmoud Darwish’s poem ‘A River Dies of Thirst’ (2008) and Mourid Barghouti’s memoir I Saw Ramallah (1997).

scholarly journals On the Stationarity of Annual Precipitation over China (1959–2018)

2020 ◽  
Vol 21 (5) ◽  
pp. 881-890 ◽  
Author(s):  
Hong Wang ◽  
Fubao Sun
Keyword(s):  
Water Resource ◽  
Resource Planning ◽  
Annual Precipitation ◽  
Observation Data ◽  
Grid Cells ◽  
The Past ◽  
Significant Difference ◽  
Average Variation ◽  
Long Term Observation

AbstractStationarity is an assumption that permeates training and practice in water-resource engineering. However, with global change, the validity of stationarity as well as uncertainty of nonstationarity in water-resource planning are being questioned; thus, it is critical to evaluate the stationarity of climate variables, especially precipitation. Based on the continuous observation data of precipitation from 1427 stations across China, 593 efficient grid cells (1° × 1°) are constructed, and the annual precipitation stationarities from 1959 to 2018 are analyzed. The evaluated autocorrelation stationarity indicates that 92.24%–96.12% of the grid cells for an autocorrelation coefficient of lag 1–8 years of precipitation are indistinguishable from 0 [90% confidence level (CL)]. The mean stationarity indicates that 97.47% of the grid cells have a stable mean for 30 years (90% CL); beyond the confidence limits, they are mainly located in the northwest of China, where annual precipitation is less, and the average exceeding range is ±3.78 mm. The long-term observation of annual precipitation in Beijing (1819–2018) and Shanghai (1879–2018) also yields autocorrelation and mean stationarities. There is no significant difference in the annual precipitations between the past 20 years (1999–2018) and the past 60 years (1959–2018) over China. Therefore, the annual precipitation in China exhibits a weak stationary behavior that is indistinguishable from the stationary stochastic process. The average variation in precipitation is ±9.55% between 30 successive years and 16.53% between 10 successive years. Therefore, it is valuable and feasible to utilize the historical data of annual precipitation as the basis of water-resources application.

scholarly journals Chennai Water Resource Management Using GIS

2021 ◽  
Author(s):  
Saral Purohit ◽  
Gadhiya Jay Dipakbhai ◽  
G. Abirami
Keyword(s):  
Resource Management ◽  
Water Resource ◽  
Water Resource Management ◽  
Rate Of Change ◽  
Water Bodies ◽  
Water Crisis ◽  
Critical Importance ◽  
The Past ◽  
The Right ◽  
The City

Water scarcity is one of the biggest problems in the country of India, this problem is often caused by poor water resource management. Notably in India, the city of Chennai has had a water crisis going on for the past few years. On June 19th, 2019, the city officials declared that the city had run out of water. This was termed as ‘Day Zero’ where there was no water left. Most of the lakes of Chennai dried out. Poor water management and very less rainfall were the major reasons for this scarcity. Water resource management thus is of critical importance to ensure that water is utilized in the right way. So the aim of the proposed system is to evaluate the nature, significance, and rate of change in the water bodies of Chennai over a period of time using GIS/Remote sensing and assess the past and present conditions of water bodies in Chennai and to understand the dynamics and trends of change through various forms of spatial analysis. This is achieved by using different functionalities of ArcGIS and ArcMap and then analysing the obtained data and maps.

Wavelet Analysis of Natural Annual Runoff in Dongjiang River

2011 ◽  
Vol 383-390 ◽  
pp. 5158-5165
Author(s):  
Jing Li ◽  
Qiu Wen Chen ◽  
Da Mei Li
Keyword(s):  
Water Resources ◽  
Wavelet Coefficient ◽  
Annual Runoff ◽  
Times Series ◽  
The Past ◽  
Dongjiang River ◽  
The Social ◽  
Wavelet Variance ◽  
Wavelet Analyses ◽  
Multi Scales

To maintain the ecosystem health and guarantee the social-economic water demand in the Dongjiang river basin, proper management of the water resources is essential. This research introduced the Morlet Wavelet analyses method to investigate the patterns of the past 45 years runoff times series of the main gauges in the Dongjiang River. The general trend and the changing characteristics in both time domain and frequency domain at different scales were revealed. The results were verified by the real part of the Wavelet coefficient and the Wavelet variance. The study discovered that the runoff in the basin exhibited multi-scales of main circle, synchronization and declining. The results could provide valuable information for the management of the water resources and ecosystem of the Dongjiang River.

scholarly journals Implications of geoarchaeological investigations for the contextualization of sacred landscapes in the Nile Delta

2021 ◽  
Vol 70 (1) ◽  
pp. 73-82
Author(s):  
Eva Lange-Athinodorou
Keyword(s):  
Water Resource ◽  
Nile Delta ◽  
Archaeological Evidence ◽  
Sacred Landscapes ◽  
The Past ◽  
Ancient Egyptian ◽  
Religious Festivals ◽  
Egyptian Religion ◽  
Female Deities

Abstract. Key elements of sacred landscapes of the Nile Delta were lakes, canals and artificial basins connected to temples, which were built on elevated terrain. In the case of temples of goddesses of an ambivalent, even dangerous, nature, i.e. lioness goddesses and all female deities who could appear as such, the purpose of sacred lakes and canals exceeded their function as a water resource for basic practical and religious needs. Their pleasing coolness was believed to calm the goddess' fiery nature, and during important religious festivals, the barques of the goddesses were rowed on those waters. As archaeological evidence was very rare in the past, the study of those sacred waters was mainly confined to textual sources. Recently applied geoarchaeological methods, however, have changed this situation dramatically: they allow in-depth investigations and reconstructions of these deltaic sacred landscapes. Exploring these newly available data, the paper presented here focuses on the sites of Buto, Sais and Bubastis, by investigating the characteristics of their sacred lakes, canals and marshes with respect to their hydrogeographical and geomorphological context and to their role in ancient Egyptian religion and mythology as well.

Sign in / Sign up

Export Citation Format

Share Document