scholarly journals Evaluation of Reservoir-Induced Hydrological Alterations and Ecological Flow Based on Multi-Indicators

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2069 ◽  
Author(s):  
Mingqian Li ◽  
Xiujuan Liang ◽  
Changlai Xiao ◽  
Xuezhu Zhang ◽  
Guiyang Li ◽  
...  

Although they fulfill various needs of human beings, reservoirs also cause hydrological regime variation in the downstream regions, thus affecting ecological diversity. Therefore, studying the reservoir-induced hydrological alterations and ecological effects is of great significance, as it could guide the regulation of the reservoir to protect the river ecology. In this study, taking the Taizi River as an example, the impact of a reservoir on hydrological alteration and ecological diversity was comprehensively evaluated through eco-flow indicators based on the flow duration curve and multiple hydrological indicators. The results reveal that: (1) Ecological indicators can be used to analyze the annual and seasonal changes in the streamflow after the construction of the reservoir. The high-flow values and frequency decrease after the construction of the reservoir, especially in the autumn, while the low-flow component values increase significantly, especially in spring and summer. (2) The main influencing factors of the ecological indicators can be reflected by the relationship with precipitation, as the annual ecosurplus is not significantly affected by the reservoir, while the ecodeficit is greatly affected, and the seasonal ecological indicators (especially in spring and summer) are greatly affected by the reservoir. (3) The indicators of hydrologic alteration (IHA) show significant changes after the construction of the reservoir and are consistent with the changes in the eco-flow indicators; the change in the Shannon index indicates that the ecological diversity reduced after construction of the reservoir. It is controlled by the reservoir, and a new equilibrium state appears. (4) The eco-flow indicators have a good correlation with the 32 IHAs; they can reflect the change information of most IHAs and can avoid statistical redundancy.

Author(s):  
Gražina ŽIBIENĖ ◽  
Alvydas ŽIBAS ◽  
Goda BLAŽAITYTĖ

The construction of dams in rivers negatively affects ecosystems because dams violate the continuity of rivers, transform the biological and physical structure of the river channels, and the most importantly – alter the hydrological regime. The impact on the hydrology of the river can occur through reducing or increasing flows, altering seasonality of flows, changing the frequency, duration and timing of flow events, etc. In order to determine the extent of the mentioned changes, The Indicators of Hydrologic Alteration (IHA) software was used in this paper. The results showed that after the construction of Angiriai dam, such changes occurred in IHA Parameters group as: the water conditions of April month decreased by 31 %; 1-day, 3-days, 7-days and 30-days maximum flow decreased; the date of minimum flow occurred 21 days later; duration of high and low pulses and the frequency of low pulses decreased, but the frequency of high pulses increased, etc. The analysis of the Environmental Flow Components showed, that the essential differences were recorded in groups of the small and large floods, when, after the establishment of the Šušvė Reservoir, the large floods no longer took place and the probability of frequency of the small floods didn’t exceed 1 time per year.


2020 ◽  
Author(s):  
Rahul Kumar Singh ◽  
Dr. Manoj Kumar Jain

<p>The rivers around the world have been transformed due to various anthropogenic activities and have led to the altered natural flow regime, which is crucial for controlling the essential environmental conditions within the river which in turn forms the biotic diversity. This study quantifies the adverse impacts due to the construction of dams on the hydrology of the Godavari and Krishna River Basins over the last half a century. The quantification of hydrologic alteration at five representative gauging stations of both the rivers has undertaken using Indicator of Hydrological Alteration (IHA) and the Flow Health (FH) methods based on the Range of Variability approach. To evaluate the alterations of flow regime due to the impact of dams (anthropogenic) only, the data for wet and dry years were excluded from the analysis as these represent the impact of climate variability. The IHA results reveal that the average monthly flow (especially from June to September), annual extreme streamflow indices (1-, 3-, and 7-day maxima flow), and rise and fall rates were among the most affected ones when compared to the pre-impacted period. The improved overall hydrologic alteration values for the Dhalegaon, Nowrangpur, K. Agraharam, and Vijayawada stations were found approximately 75.5%, 73.2%, 76.9 %, and 67.9 % respectively, suggesting a significant impact on the overall riverine ecosystem. The flow health (FH) analysis scores for high flow (HF) (K.Agraharam and Yadgir) highest monthly (HM) (Dhalegaon, K.Agraharam, and Yadgir), Low Flow (LF) (Dhalegaon) and flood flow intervals (FFI) (Dhalegaon and Vijayawada) during the test period were in the very high alteration range and these all hydrological indicator represents important ecological functions in both the rivers. The results showed in this study may guide in strategizing the multi-step process needed to improve the riverine ecosystems of Godavari and Krishna Basins and their ecological functioning.</p><p>Keywords: Hydrological alteration; Krishna River; Godavari River; Ecosystem</p>


2021 ◽  
Vol 4 (2) ◽  
pp. 272-281
Author(s):  
Ahmad Kamil ◽  
Tajuddin Nur ◽  
Astuti Darmiyanti

The purpose of this study is to examine the relationship between the tahfidz Al-Qur'an program and student achievement in Islamic religious education topics. The issue is intellectual; many feel competent, but do they have confidence in their pupils' ability to be good and decent in society? The qualitative technique was utilized to analyze the online tahfidz Al Quran program's effectiveness in enhancing Islamic religious education learning outcomes. The results showed that the online tahfidz Al-Quran program could improve learning outcomes of Islamic religious education because memorizing the Qur'an will train students to have high concentration, which is an absolute thing that students must possess to be able to get all knowledge, including education. Islam. Besides that, the researchers also found that the impact of the tahfidz Al Quran program is very in line with what is the goal of Islamic religious education, namely to make students become good human beings following their nature, free from morals, disobedience and darkness.


2018 ◽  
Vol 13 (Number 1) ◽  
pp. 1-11
Author(s):  
Novia Zahrah ◽  
Azelin Aziz ◽  
Siti Norasyikin Abdul Hamid

This paper conceptualizes the role of work engagement as mediationon the relationship between religious spirituality and job performance of Muslim employees in Malaysia. Religious spirituality involves the belief in the existence of God and the power of prayer as a way of communicating with God in all aspects of life. Religious spirituality encourages individuals to mends the relationship between God and human (habluminallah) as well as the relationship between human beings (habluminannas) in order to be able to deal with hardship and obtains long-term satisfaction. The ability of an employee to overcome any hardship will enhance their work engagement and job performance. Thus, in response to the impact of religious spirituality in enhancing work engagement and job performance, this study developseveral propositions that demonstrate the significant role of related variables in enhancing job performance. Suggestions for future research and implications of the study for managers are presented. This study recommends management and human resource practitioners to be proactive and formulate preventive strategyagainst low productivity among Muslim employees by providestraining, create an environment that supports wholeness, meaningful work, and feeling of inner satisfaction. However, there is needfor empirical studies to test the proposed relationships.


Slavic Review ◽  
1977 ◽  
Vol 36 (2) ◽  
pp. 187-204 ◽  
Author(s):  
Teddy J. Uldricks

We must finally understand that of all precious capital in the world, the most precious capital, the most decisive capital is human beings, cadres. We must understand that in our present condition cadres decide everything. If we have good and plentiful cadres in industry, in agriculture, in transport, in the Army, our country will be invincible. If we have no such cadres we will limp with both legs.Joseph StalinDescartes argued that the initial operation in the solution of any complex problem must be its subdivision into a series of smaller, less intricate, and therefore, hopefully, more tractable problems. Following that strategy, this study will examine one particular aspect of the purges—the destruction of the Soviet diplomatic corps—in an attempt to shed more light on the general nature of the purges and to assess the relationship, if any, between the purges and the evolution of Soviet foreign policy in the 1930s. The central tasks, then, are to describe the impact of the "Great Terror" on the People's Commissariat of Foreign Affairs and its embassies, and to evaluate the significance of these developments for both domestic politics and foreign relations of the USSR.


2013 ◽  
Vol 5 (1) ◽  
pp. 64-80 ◽  
Author(s):  
Lucy Huskinson

Jung's metaphor of house as psyche is often regarded as little more than an arbitrary and reductive ‘diagram’ that imposes structure onto his conception of psyche with its various parts and underpinning libidinal processes. And yet, as this paper argues, the impact and relevance of the architectural metaphor extends beyond a conceptual consideration of psyche into a lived experience of it. It is thus also Jung's phenomenological description of the way human beings dwell and experience their placement or non-placement within the world in which they find themselves. This paper elucidates these different interpretations. First, through Jung's accounts of his ‘dream-house’ in connection with the likely architectural influences of those houses in which he had lived or had designs to live; and second, through an examination of a curious mistranslation of one of Jung's overlooked descriptions of the architectural metaphor found in the celebrated work, La poetique de l'espace (1957)/The poetics of space (1958) by the renowned French philosopher Gaston Bachelard. The metaphorical description under scrutiny is the relationship between cellar and attic rooms, which Jung uses in his essay ‘Allgemeines zur komplextheorie’ (1934)/‘A review of the complex theory’ (1948a) to expound his understanding of the effects of the complex on ego-consciousness. Bachelard's misreading inadvertently reverts the placement of the two rooms, thereby proffering something akin to a ‘topsy-turvy’ house of psyche. The implications of Bachelard's misreading for an understanding of Jungian complex theory is explored, and the wider conceptual and phenomenological implications for the possible redesign or renovation of Jung's metaphor of house as psyche are ascertained.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ridhima Saggar ◽  
Nischay Arora ◽  
Balwinder Singh

Purpose The study aims to pervade the gap in the domain of risk disclosure and gender diversity, which is comparatively uncharted. Gender diversity being a crucial element of corporate governance can deepen understanding on the issue in the backdrop of a developing country such as India, so this study aims to investigate the relationship between gender diversity on board and corporate risk disclosure. Design/methodology/approach Four measures of gender diversity, i.e. BLAU index, SHANNON index, proportion of women directors on board and female dummies, have been deployed to measure gender diversity. The empirical analysis is premised on a sample of S&P BSE 100 index pertaining to the 2018–2019 financial year; which eventually gets reduced to 70 non-financial firms after eliminating 30 financial firms. To examine the impact of gender diversity on corporate risk disclosure, hierarchical regression has been used. Additionally, two-stage least square regression analysis has been performed for checking the endogeneity issues in data and validating the findings of the study. Findings The main findings unveil that gender diversity positively impacts corporate risk disclosure. Confirming the agency theory and resource dependency theory, its alternative measures like BLAU index, SHANNON index, proportion of women directors and female dummy divulged to positively impact corporate risk disclosure. When women dummy has been used, analysis unmasked that firms electing more than one female director on board has a higher positive impact on corporate risk disclosure as compared to firms engaging only one women director on board. Research limitations/implications The study is undertaken in the Indian settings, which has its own set of legislative laws, whereas there is need to reaffirm the relationship applying cross-country analysis. Furthermore, there is huge hollowness in the domain of gender diversity and risk disclosure that calls for empirical evidence to unearth futuristic vision. Practical implications The research presents managerial implications for the managers to promote gender egalitarianism by electing higher quantum of women directors on board to achieve global standards of maintaining higher risk disclosure. Adequate risk disclosure on a gender-diverse board further assures the investors that their interest will remain intact in the organization that meets legal requirements by embracing gender equality in employment. A woman in the boardrooms incarnates transparency through divulgence of risk information, which suffices the informational needs of investors. In addition, the findings insists the regulators towards staunch enforcement of effective corporate governance practice through increasing the proportion of women directors on board as they assist in dispelling risk disclosure, which will avert sceptical ambitions of managers and deconstruct their stereotype attitude towards women. Originality/value This study is a novel contribution in expanding the risk disclosure literature by analyzing the unexplored impact of gender diversity on the extent of corporate risk disclosures in India.


The authors continue with their examples of testing in this chapter by considering several examples for how to engage in testing from the natural sciences. They explore the impact and personal connections that can be made regarding a feature of anatomy: eyebrows. They next show how to move from Google to Lookle with regard to the question of whether human beings need meat. They then move to a geological question about whether catastrophism was wrong. Next, they consider Edward Jenner's work moving from observations about the relationship of cowpox to smallpox to the development of vaccines. And lastly, they work through the possible impact and personal connections to Rudolf Clausius' ideas about entropy.


2017 ◽  
Vol 27 (1) ◽  
pp. 57-94
Author(s):  
Stephen Taysom

AbstractSince its inception in 1830, an important feature of Mormonism has been its belief in a literal Devil and in the ability of the Devil to possess human beings. Despite the pervasiveness of these beliefs and practices, Mormon possession and exorcism is a largely unstudied phenomenon. What follows is a careful study of four historical accounts of Mormon exorcism rituals dating from 1830, 1839, 1888, and 1977, and their narrative presentations. This article traces the development of Mormon possession/exorcism beliefs and practices and situates them within their larger historical contexts. The article also describes the relationship between Mormon dispossession rituals and the dispossession rituals of Protestant and Catholic groups in American history and presents through a consideration of the impact of broader American cultural trends on the theory and practice of Mormon exorcism from 1830 to 1977.


2020 ◽  
Vol 8 (12) ◽  
pp. 980
Author(s):  
Jose Valles ◽  
Gerald Corzo ◽  
Dimitri Solomatine

Hydrological models are based on the relationship between rainfall and discharge, which means that a poor representation of rainfall produces a poor streamflow result. Typically, a poor representation of rainfall input is produced by a gauge network that is not able to capture the rainfall event. The main objective of this study is to evaluate the impact of the mean areal rainfall on a modular rainfall-runoff model. These types of models are based on the divide-and-conquer approach and two specialized hydrological models for high and low regimes were built and then combined to form a committee of model that takes the strengths of both specialized models. The results show that the committee of models produces a reasonable reproduction of the observed flow for high and low flow regimes. Furthermore, a sensitivity analysis reveals that Ilopango and Jerusalem rainfall gauges are the most beneficial for discharge calculation since they appear in most of the rainfall subset that produces low Root Mean Square Error (RMSE) values. Conversely, the Puente Viejo and Panchimalco rainfall gauges are the least beneficial for the rainfall-runoff model since these gauges appear in most of the rainfall subset that produces high RMSE value.


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