scholarly journals An activity-based integrated land-use transport model for urban spatial distribution simulation

2017 ◽  
Vol 46 (1) ◽  
pp. 165-178 ◽  
Author(s):  
Fangqu Niu ◽  
Jun Li

This research develops an activity-based integrated land use/transport interaction model based on the concepts – activities (mainly, households and employment activities), activity location and relocation for Chinese regions. It consists of a residential and employment location sub-model, a transport sub-model and an implicit real estate rent adjustment sub-model. The model is developed to model the urban activity distribution evolution, predict urban spatial development trends and examine various planning decision implications. It spatially distributes household and employment activity change of a study area by zone based on the current activity distribution, land use policies and the accessibilities of the zones. The model is subsequently calibrated to predict the distribution of households and employment activities in Beijing metropolitan area in 2025. Model results show that the resident and employment densities are still high in central Beijing in 2025, and most zones’ resident densities are higher than their employment densities. However, there is also significant population density increase along the 6th ring road, indicating the relocation trend of the residents and businesses to the outskirts. This is consistent with the government objectives to decentralize activities within the central urban area. The paper also suggests that the model should be used mainly in examining the possible differences arising from the adoption of different policies though predicting future of a city distribution proves feasible.

1975 ◽  
Vol 2 (1) ◽  
pp. 85-97 ◽  
Author(s):  
B. G. Hutchinson

Urban strategy planning studies are directed towards the estimation of the transport demand and other servicing implications of a range of urban development alternatives. These studies attempt to isolate those concepts which might lead to costly and intractable infrastructure problems. Several analytical tools that may be used to explore the implications of strategic development alternatives are described.A land use-transport model is described which may be used to estimate the implications of alternative public development policies. These policies may include servicing and transportation options, basic and service employment location alternatives, and zoning. The model calculates an internally consistent co-distribution of population and employment along with the associated travel demands for each set of public policies. A corridor-level traffic assignment technique is described which may be used along with the land use-transport model to develop corridor travel demand estimates for each development concept. Computer-based procedures for estimating the servicing requirements of alternative development concepts are also described. These procedures directly employ the land use allocations calculated by the land use model. The use of the analytical tools is illustrated with information from the Hamilton area.


2012 ◽  
Vol 11 ◽  
pp. 16-21 ◽  
Author(s):  
Rabin K. Sharma

Land use is one of the priority sectors of Government of Nepal which can be visualized from the different official documents of the Government. In each of these documents, short term policy is introduced and most of the times it succeeded with partial implementation of the said policy. Therefore, this paper tried to review how the land use policies have been evolved from the period of eighth live year plan to date. Recently the council of ministers, Government of Nepal approved the Land Use Policy. The progress so far made in the preparation of land use data and maps have been briefly mentioned. Some of the key issues have been identified for not achieving the targeted goals of land use policy and proposed some suggestions to overcome the shortcomings. After the adoption of land use policy, it will effectively support in execution of land use implementation plan.  


2021 ◽  
Vol 13 (4) ◽  
pp. 1608
Author(s):  
Rubén Cordera ◽  
Soledad Nogués ◽  
Esther González-González ◽  
José Luis Moura

Autonomous vehicles (AVs) can generate major changes in urban systems due to their ability to use road infrastructures more efficiently and shorten trip times. However, there is great uncertainty about these effects and about whether the use of these vehicles will continue to be private, in continuity with the current paradigm, or whether they will become shared (carsharing/ridesharing). In order to try to shed light on these matters, the use of a scenario-based methodology and the evaluation of the scenarios using a land use–transport interaction model (LUTI model TRANSPACE) is proposed. This model allows simulating the impacts that changes in the transport system can generate on the location of households and companies oriented to local demand and accessibility conditions. The obtained results allow us to state that, if AVs would generate a significant increase in the capacity of urban and interurban road infrastructures, the impacts on mobility and on the location of activities could be positive, with a decrease in the distances traveled, trip times, and no evidence of significant urban sprawl processes. However, if these increases in capacity are accompanied by a large augment in the demand for shared journeys by new users (young, elderly) or empty journeys, the positive effects could disappear. Thus, this scenario would imply an increase in trip times, reduced accessibilities, and longer average distances traveled, all of which could cause the unwanted effect of expelling activities from the consolidated urban center.


Author(s):  
Elena C. McDonald-Buller ◽  
Alba Webb ◽  
Kara M. Kockelman ◽  
Bin (Brenda) Zhou

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 616
Author(s):  
Jie Gao ◽  
Xuguang Tang ◽  
Shiqiu Lin ◽  
Hongyan Bian

The ecosystem services (ESs) provided by mountain regions can bring about benefits to people living in and around the mountains. Ecosystems in mountain areas are fragile and sensitive to anthropogenic disturbance. Understanding the effect of land use change on ESs and their relationships can lead to sustainable land use management in mountain regions with complex topography. Chongqing, as a typical mountain region, was selected as the site of this research. The long-term impacts of land use change on four key ESs (i.e., water yield (WY), soil conservation (SC), carbon storage (CS), and habitat quality (HQ)) and their relationships were assessed from the past to the future (at five-year intervals, 1995–2050). Three future scenarios were constructed to represent the ecological restoration policy and different socioeconomic developments. From 1995 to 2015, WY and SC experienced overall increases. CS and HQ increased slightly at first and then decreased significantly. A scenario analysis suggested that, if the urban area continues to increase at low altitudes, by 2050, CS and HQ are predicted to decrease moderately. However, great improvements in SC, HQ, and CS are expected to be achieved by the middle of the century if the government continues to make efforts towards vegetation restoration on the steep slopes.


2020 ◽  
Vol 12 (15) ◽  
pp. 6261
Author(s):  
Misginaw Arficho ◽  
Andreas Thiel

The study set out to understand drivers of Land-Use Land Cover (LULC) changes in dry-land areas and investigate factors helping mitigate the adverse impacts of climate anomalies on LULC changes. By employing a mixed-methods design, it combined LULC data with socioeconomic and climatic data, to analyze the pattern of LULC changes and its socioeconomic and climatic driving forces along with moderating factors. It was found that rangeland decreased by 764 km2 (13% of total area) between 1986 and 2015. The results from the Seemingly Unrelated time series regression models confirmed preliminary evidence that climate variability, as well as adaptive land-use policies lacking components of sustainability increase the likelihood of degradation and contraction of rangelands. We also found an indication from the qualitative data that a widening power gap between the customary and statutory governance system reinforces unsustainable land use by obscuring the values of the customary land governance system. However, those policies encompassing economic and natural resource development objectives abate adverse effects of climate variability on land degradation and shrinkage of rangelands. The results suggest that a land governance system with natural resource development objectives fitting to the local context could be an effective policy instrument to lessen the adverse effects of climate anomalies on LULC changes. Although this study focused on analyzing the LULC changes and its drivers in dry-land area, the findings may well have a bearing on the formulation and implementation of effective adaptation and sustainable land-use policies.


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