Key Laboratory of Land Resources Evaluation and Monitoring in Southwest

Chengdu, China

Key Laboratory of Land Resources Evaluation and Monitoring in Southwest

Chengdu, China

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Cheng W.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Cheng W.,CAS Chengdu Institute of Biology | Zhou J.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Wang Y.,CAS Chengdu Institute of Biology | Ren P.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest
WIT Transactions on Ecology and the Environment | Year: 2014

The upstream area of Yangtze River is one of China's key eco-regions and the security of Yangtze River's ecological watershed. In order to promote China's ecological function assessment and planning, enhance the ability of the region's water conservation and other ecological functions, control the status of ecosystem degradation of the Yangtze River region, the threat of degradation of ecosystem functions on the Yangtze River were assessed in this study. The technology method is a three-level index system structure built on forest, grassland, farmland and wetland ecosystems. Invest model, Principal Component Analysis, AHP method, Data Standardization and GIS, RS were applied in the evaluation process, the grid cell size is 100 × 100 meter. Final evaluation results show that the Yangtze River showing from the "scattered" development "focus on a contiguous" state of degradation. © 2013 WIT Press.


Gu J.-R.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Chen X.-W.,The Bureau of Land and Resources of Chengdu | Jiang L.-G.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Yang H.-L.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Yu Y.-X.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest
Journal of Donghua University (English Edition) | Year: 2015

Intensive land use (ILU) policies affect the demand and supply of land. These policies promote efficient land use, and demands for land must therefore be evaluated in terms of the level of land-use intensity. If the demand is considered excessive, ILU policies act like a “valve” to restrict the land supply. Drawing on data from Chengdu, China, where developable land is scarce, we construct a model using system dynamics (SD) to simulate two scenarios: ILU development and non-ILU development. The results show that when ILU leads to positive land-use efficiency, land supply will exceed demand, resulting in an appropriate level of real demand for the current population level and GDP. Thus, artificial demand (inflated by investors) is reduced. By contrast, when non-ILU leads to negative land-use efficiency, land demand will exceed supply. In this scenario, artificial demand is higher than real demand. Copyright © 2015 Editorial Department of Journal of Donghua University, Shanghai, China. All rights reserved.


Yan X.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Zhao T.,Sichuan Normal University | Lan T.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Cao F.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | And 2 more authors.
Proceedings - International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, CDCIEM 2011 | Year: 2011

Surveys has been developed for the quality of the soil environment in the vegetable plot, choosing some vegetable bases in Chengdu's suburb- Pengzhou as the study area. In order to analyze the changing trend of soil environmental quality in the suburban vegetable base, comparisons from the soil pH, soil nutrient composition, soil heavy metals to pesticide residues have been made with the previous results which were published in the Second National Soil Survey in 1984. The results show that compared with 1984, nowadays (2009) the soil pH is significantly declined and the soil(pH ≤ 6.0) accounts is nearly as much as 82.35% of all the soil studied in Pengzhou; as for the nutrient content, total nitrogen, ammonium nitrogen, available phosphorus and potassium in the pick-up soil have been improved respectively, while the organic matter content has been lowered obviously; in the heavy metal content survey, almost all the kinds of metal involved here are increased except Hg. The conclusion can be made: in recent 25 years, the soil environmental quality of the vegetable base in Pengzhou is overall becoming worse and worse. © 2011 IEEE.


Cheng W.-X.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Zhou J.-M.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Yang C.-J.,Key Laboratory of Land Resources Evaluation and Monitoring in Southwest | Zhou W.-C.,Chinese Academy of Sciences
Procedia Environmental Sciences | Year: 2011

At present, the research in the field of remote sensing image fusion is frequently. But the case of remote image fusion research by TM and CBERS image is less. In this paper, firstly, author apply six image fusion methods fused the TM and CBERS image in Anju district, Sichuan province. Secondly, author using the programming which writing by matlab software for image fusion quality evaluation.The results show that the qulity fused by WAV is the best one in six methods. The results of research can supply a good basic data for recognition of remote sensing. © 2011 Published by Elsevier Ltd.

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