scholarly journals Human impact on regional groundwater composition through intervention in natural flow patterns and changes in land use

1992 ◽  
Vol 134 (1-4) ◽  
pp. 297-313 ◽  
Author(s):  
P.P. Schot ◽  
J. van der Wal
Keyword(s):  
Land Use ◽  
Human Impact ◽  
Flow Patterns ◽  
Natural Flow ◽  
Groundwater Composition ◽  
Regional Groundwater

Land use effects in groundwater composition of an alluvial aquifer (Trussu River, Brazil) by multivariate techniques

2008 ◽  
Vol 106 (2) ◽  
pp. 170-177 ◽  
Author(s):  
Eunice Maia de Andrade ◽  
Helba Araújo Queiroz Palácio ◽  
Ivam Holanda Souza ◽  
Raimundo Alípio de Oliveira Leão ◽  
Maria João Guerreiro
Keyword(s):  
Land Use ◽  
Alluvial Aquifer ◽  
Multivariate Techniques ◽  
Land Use Effects ◽  
Groundwater Composition

scholarly journals Dominant Fish and Macroinvertebrate Response to Flow Changes of the Geum River in Korea

Water ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 942 ◽  
Author(s):  
Hyeongsik Kang ◽  
Byungwoong Choi
Keyword(s):  
Flow Patterns ◽  
Base Flow ◽  
Physical Habitat ◽  
Aquatic Species ◽  
Morphology Change ◽  
Suitability Index ◽  
Natural Flow ◽  
Habitat Simulation ◽  
Target Fish ◽  
The Impact

This study presents the impact of natural flow patterns on downstream aquatic species habitats in a reach of the Geum River, Korea. The study reach is a 13.4 km long, located downstream of the Yongdam Dam. To assess such an impact, this study performed physical habitat simulations. The River2D model was used for the computation of the flow field and morphology, and the Habitat Suitability Index (HSI) model for the habitat simulation. Three habitat variables—flow depth, velocity, and substrate were used. The Zacco platypus and Baetis fuscatus were selected as the target fish and benthic macro-invertebrate, respectively. Using the building block approach (BBA), the scenarios for modifying dam operations were constructed in the study reach. Scenario 1, scenario 2, and scenario 3 were proposed by using the magnitude–duration concept, base flow allocation concept, and seasonally adjusted minimum flow allocation concept, respectively. Simulation results indicated that the scenarios’ effects significantly increased by about 14.3% for the weighted usable area (WUA). In addition, the morphology change with the restoration of flood events was investigated. It was revealed that the morphology change in the physical habitat simulations further increased by about 13% for the WUA. The change of dam operations through natural flow patterns is more advantageous to aquatic species.

The Big Map

2021 ◽  
pp. 168-190
Author(s):  
Brad Edmondson
Keyword(s):  
Land Use ◽  
Human Impact ◽  
State Legislature ◽  
The State ◽  
Adirondack Park ◽  
Board Members ◽  
Legal Requirements ◽  
The North ◽  
Land Use Plan ◽  
Boundary Lines

This chapter tells the story of how the early Adirondack Park Agency (APA) struggled to meet the state's assignments. It details what the state legislature gave to the early APA: an extremely ambitious to-do list and a ridiculously small budget. Much of the work depended on the men who had also worked for the Temporary Study Commission (TSC). The chapter analyses the story of George Davis who turned the idea for his dissertation into a big map that transformed life in the North Country. Davis's passion was protecting land that he thought should remain free of human impact. His thesis would compile data to show which Adirondack lands were suitable for development and which should remain undisturbed. The chapter then shifts with the APA chairman, Richard Lawrence who overcame opposition on several fronts as he struggled to maintain a working majority of board members, and the tireless work of Peter Paine, a well-connected lawyer, who argued stridently for the two plans. Ultimately, the chapter explains the significance of the APA map project. It argues that map making was important because the legal requirements for the land use plan were unusual, as most land use laws use text to describe the boundary lines of the area being regulated.

scholarly journals Unfolding Spatial-Temporal Patterns of Taxi Trip based on an Improved Network Kernel Density Estimation

2020 ◽  
Vol 9 (11) ◽  
pp. 683
Author(s):  
Boxi Shen ◽  
Xiang Xu ◽  
Jun Li ◽  
Antonio Plaza ◽  
Qunying Huang
Keyword(s):  
Land Use ◽  
Density Estimation ◽  
Kernel Density Estimation ◽  
Network Flow ◽  
Network Flows ◽  
Kernel Density ◽  
Temporal Patterns ◽  
Flow Patterns ◽  
Urban Traffic ◽  
Mobility Data

Taxi mobility data plays an important role in understanding urban mobility in the context of urban traffic. Specifically, the taxi is an important part of urban transportation, and taxi trips reflect human behaviors and mobility patterns, allowing us to identify the spatial variety of such patterns. Although taxi trips are generated in the form of network flows, previous works have rarely considered network flow patterns in the analysis of taxi mobility data; Instead, most works focused on point patterns or trip patterns, which may provide an incomplete snapshot. In this work, we propose a novel approach to explore the spatial-temporal patterns of taxi travel by considering point, trip and network flow patterns in a simultaneous fashion. Within this approach, an improved network kernel density estimation (imNKDE) method is first developed to estimate the density of taxi trip pick-up and drop-off points (ODs). Next, the correlation between taxi service activities (i.e., ODs) and land-use is examined. Then, the trip patterns of taxi trips and its corresponding routes are analyzed to reveal the correlation between trips and road structure. Finally, network flow analysis for taxi trip among areas of varying land-use types at different times are performed to discover spatial and temporal taxi trip ODs from a new perspective. A case study in the city of Shenzhen, China, is thoroughly presented and discussed for illustrative purposes.

scholarly journals ASSESSMENT OF HISTORICAL BIO-INDEX CHANGES IN RURAL AREAS IN SOUTHERN POLAND – CASE STUDY

2018 ◽  
Author(s):  
Barbara PRUS ◽  
Stanisław BACIOR ◽  
Małgorzata DUDZIŃSKA
Keyword(s):  
Land Use ◽  
Human Impact ◽  
Rural Areas ◽  
Anthropogenic Impact ◽  
Land Use Changes ◽  
Self Regulation ◽  
Anthropogenic Pressure ◽  
Ecological Stability ◽  
Southern Poland ◽  
Use Categories

Intensity of land use could be considered as an indicator of rate of anthropogenic impact on landscape (CAI) and the coefficient of ecological stability (CES). These two bio-indexes are based on the land use categories. The CAI coefficient is the ratio of the sum of percentile areas of land characterized by considerable human impact in relation to the sum of percentile areas of lands with low or none anthropogenic pressure. The CES index describes the structure of land use in one unit according to land use categories weighted by given coefficients. The calculation of the complex integral index enables to know the potential of the environment, i.e. a natural resource reserve with a structure that allows self-regulation of ecosystems and expresses the environment's resistance to bearing anthropogenic loads. The aim of the study is to analyze the historical land use changes (in the period of 1845-2016) in rural areas of Southern Poland using bio-indexes such as the anthropogenic impact on landscape (CAI) and the coefficient of ecological stability (CES). The analysis led to the conclusion about the strong dynamics of changes during this period which is largely due to the growth of the percentile areas of lands with considerable human impact especially after the historical transformation in 1989 in Poland. At the same time, the attention should be paid to the land use changes as an effect of growing suburbanization. The results of the study can be used by public authorities, citizens and governing bodies to form a system of measures to calculate environmental potential and modelling changes which ensure the environmental protection and sustainable development of rural areas.

Sign in / Sign up

Export Citation Format

Share Document