River sediments provide a link between catchment pressures and ecological status in a mixed land use Scottish River system

Assessing transport CO2 emissions is important in the development of low-carbon strategies, but studies based on mixed land use are rare. This study assessed CO2 emissions from passenger transport in traffic analysis zones (TAZs) at the community level, based on a combination of the mixed-use development model and the vehicle emission calculation model. Based on mixed land use and transport accessibility, the mixed-use development model was adopted to estimate travel demand, including travel modes and distances. As a leading low-carbon city project of international cooperation in China, Shenzhen International Low-Carbon City Core Area was chosen as a case study. The results clearly illustrate travel demand and CO2 emissions of different travel modes between communities and show that car trips account for the vast majority of emissions in all types of travel modes in each community. Spatial emission differences are prominently associated with inadequately mixed land use layouts and unbalanced transport accessibility. The findings demonstrate the significance of the mixed land use and associated job-housing balance in reducing passenger CO2 emissions from passenger transport, especially in per capita emissions. Policy implications are given based on the results to facilitate sophisticated transport emission control at a finer spatial scale. This new framework can be used for assessing the impacts of urban planning on transport emissions to promote sustainable urbanization in developing countries.

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Relationship between Land Use Mix and Walking Choice in High-Density Cities: A Review of Walking in Seoul, South Korea

Sustainability ◽

10.3390/su13020810 ◽

2021 ◽

Vol 13 (2) ◽

pp. 810

Author(s):

Eun Yeong Seong ◽

Nam Hwi Lee ◽

Chang Gyu Choi

Keyword(s):

Land Use ◽

Neighborhood Environment ◽

Single Family ◽

Housing Type ◽

General Belief ◽

Factors Affecting ◽

Land Use Mix ◽

Family Housing ◽

Mixed Land Use ◽

Major Factors

This study confirmed the general belief of urban planners that mixed land use promotes walking in Seoul, a metropolis in East Asia, by analyzing the effect of mixed land use on the travel mode choice of housewives and unemployed people who make non-commuting trips on weekdays. Using binomial logistic regression of commuting data, it was found that the more mixed a neighborhood environment’s uses are, the more the pedestrians prefer to walk rather than drive. The nonlinear relationship between the land use mix index and the choice to walk was also confirmed. Although mixed land use in neighborhoods increased the probability of residents choosing walking over using cars, when the degree of complexity increased above a certain level, the opposite effect was observed. As the density of commercial areas increased, the probability of selecting walking increased. In addition to locational characteristics, income and housing type were also major factors affecting the choice to walk; i.e., when the residents’ neighborhood environment was controlled for higher income and living in an apartment rather than multi-family or single-family housing, they were more likely to choose driving over walking.

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Principles to develop a simplified multimetric index for the assessment of the ecological status of Armenian rivers on example of the Arpa River system

Environmental Monitoring and Assessment ◽

10.1007/s10661-021-08994-3 ◽

2021 ◽

Vol 193 (4) ◽

Author(s):

Vardan Asatryan ◽

Marine Dallakyan

Keyword(s):

Ecological Status ◽

River System ◽

Multimetric Index

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Land-use and agriculture in Denmark around year 1900 and the quest for EU Water Framework Directive reference conditions in coastal waters

AMBIO ◽

10.1007/s13280-021-01536-8 ◽

2021 ◽

Author(s):

Bent T. Christensen ◽

Birger F. Pedersen ◽

Jørgen E. Olesen ◽

Jørgen Eriksen

Keyword(s):

Land Use ◽

Water Framework Directive ◽

Coastal Waters ◽

Root Zone ◽

Reference Conditions ◽

Ecological Status ◽

Agricultural Activity ◽

Eu Water Framework Directive ◽

Alternative Approach ◽

The Eu

AbstractThe EU Water Framework Directive (WFD) aims to protect the ecological status of coastal waters. To establish acceptable boundaries between good and moderate ecological status, the WFD calls for reference conditions practically undisturbed by human impact. For Denmark, the nitrogen (N) concentrations present around year 1900 have been suggested to represent reference conditions. As the N load of coastal waters relates closely to runoff from land, any reduction in load links to agricultural activity. We challenge the current use of historical N balances to establish WFD reference conditions and initiate an alternative approach based on parish-level land-use statistics collected 1896/1900 and N concentrations in root zone percolates from experiments with year 1900-relevant management. This approach may be more widely applicable for landscapes with detailed historic information on agricultural activity. Using this approach, we find an average N concentration in root zone percolates that is close to that of current agriculture. Thus, considering Danish coastal waters to be practically unaffected by human activity around year 1900 remains futile as 75% of the land area was subject to agricultural activity with a substantial potential for N loss to the environment. It appears unlikely that the ecological state of coastal waters around year 1900 may serve as WFD reference condition.

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Fully distributed versus semi-distributed process simulation of a highly managed watershed with mixed land use and irrigation return flow

Environmental Modelling & Software ◽

10.1016/j.envsoft.2021.105000 ◽

2021 ◽

Vol 140 ◽

pp. 105000

Author(s):

Anoop Valiya Veettil ◽

Timothy R. Green ◽

Holm Kipka ◽

Mazdak Arabi ◽

Nathan Lighthart ◽

...

Keyword(s):

Land Use ◽

Process Simulation ◽

Return Flow ◽

Irrigation Return Flow ◽

Distributed Process ◽

Mixed Land Use

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Walkability and Mixed Land Use in German Cities: A Case in Heidelberg ( poster )

Journal of Transport & Health ◽

10.1016/j.jth.2017.11.014 ◽

2017 ◽

Vol 7 ◽

pp. S8

Author(s):

Cristina López Lindemann

Keyword(s):

Land Use ◽

Mixed Land Use ◽

German Cities

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Agricultural practices drive biological loads, seasonal patterns and potential pathogens in the aerobiome of a mixed-land-use dryland

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.149239 ◽

2021 ◽

pp. 149239

Author(s):

Damien R. Finn ◽

Juan Maldonado ◽

Francesca de Martini ◽

Julian Yu ◽

C. Ryan Penton ◽

...

Keyword(s):

Land Use ◽

Agricultural Practices ◽

Seasonal Patterns ◽

Mixed Land Use

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Integrative hydrogeo-ecological assessment of the quantitative and qualitative response of groundwater to hydrological extremes

10.5194/egusphere-egu21-13111 ◽

2021 ◽

Author(s):

Steffen Birk ◽

Johannes Haas ◽

Alice Retter ◽

Raoul Collenteur ◽

Heike Brielmann ◽

...

Keyword(s):

Water Quality ◽

Land Use ◽

Ecological Status ◽

Urban Land Use ◽

In Situ Monitoring ◽

Drought Indices ◽

Groundwater Levels ◽

Hydrological Conditions ◽

Hydrological Extremes ◽

Observation Wells

<p>An integrative interdisciplinary approach is currently developed to investigate groundwater systems in alpine and prealpine environments and how they respond to hydrological extremes such as droughts, heavy rain and floods in terms of water quantity, hydrochemical quality, and ecological status. The new approach is aimed at improving the understanding of the interaction between physical, chemical, and biological processes in groundwater responses to extreme events as well as developing indicators suitable for an integrative monitoring and management of the aquifers. For this purpose, observation wells of the existing state hydrographic monitoring net have been selected within the Austrian part of the Mur river basin, stretching from the alpine origin to the national border in the foreland. The investigation area thus comprises diverse hydrogeological settings and land-use types. The selected observation wells have long-term records of groundwater levels and are used for sampling campaigns under different hydrological conditions. Groundwater level fluctuations are evaluated using drought indices and statistical approaches, such as auto-correlation and cross-correlation with precipitation and stream stages. Our hydrochemical analyses of groundwater and surface waters also consider compounds indicative of agricultural sources (e.g., nitrate), wastewater-borne micro-pollutants, and stable isotopes of water. These indicators are used to identify different drivers controlling water origin and quality. The ecological status is characterized using microbiological measures, such as total number of bacteria and microbial activity, groundwater fauna, and the qualitative composition of dissolved organic matter (DOM). First results demonstrate a deterioration of water quality from groundwater to surface water and from the alpine region towards the foreland, corresponding to the more intense agricultural and urban land use in the foreland. Linkages between water quality and hydrological conditions are currently being evaluated and will be further examined using UV-Vis spectrometry for high-resolution in-situ monitoring of water quality changes (DOM and nitrate) at selected observation wells.</p>

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