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The purpose of this document is to communicate an economic vision for Urban Economics. Solving the environmental problems associated with urbanization requires lateral thinking, or rather vertical thinking. Problems abound when considering the environmental challenges of an increasingly urban society. Among these are a decreasing vegetation cover of the soil, water absorption capacity, shade and temperature...
The ecological footprint, as an excellent tool, has received much attention as an indicator for sustainable development over the 10 years. Pasture is one important natural resource. How can we calculate the pasture footprint dominant by agriculture and animal husbandry in Northern China. We take different approaches calculation the pasture. First we use the conventional ecological footprint method...
The degradation and rehabilitation of dry valley are increasingly a focus of scientific and applied interest. This paper reviews the general conditions of eco-environmental degradation and puts forward a landscape approach for rehabilitation. Primarily, soil and vegetation degradation is the main cause of the degradation. Systematic analysis and insights into the soil and vegetation degradation phenomena...
Many experiments have verified that Sabina vulgaris shrubs had distinguished advantage in anti-drought, but a lot of past works were primarily focused on its eco-physiological characteristics, with its growth model almost never explored. In this work, the primary model of S. vulgaris shrubs is discussed and improved based on the dual-scale automaton model with the data from experiments. The diversification...
What is the relationship between vegetation patterns and climate changes in China? The geographic distribution of vegetation types in China in the past 100 years and future was simulated based on climatology using a small set of plant functional types (PFTs) embedded in the biogeochemistry biogeography model BIOME4. Results show that as time goes by, vegetation sensitivity to climate change is a increasing...
With the fast development of Chinese economy, expressway, as the most important portion of the highway networks, had been developed at an astonishing fast speed, which brought on increasingly severe ecological environmental problems in the mean time such as soil and water loss, damage of vegetation ecosystem, geological environment and water environment etc. As a result, the ecological environmental...
A study was initiated in a small semi-arid catchment with reforestation history to elucidate the soil change. Results showed that land use pattern was closely related with terrain conditions and human disturbance levels. Soil properties under four typical human-disturbed land use types (orchard, shrub, cropland and reforested land) were compared. Significant differences were found for total nitrogen...
Responses of hydrologic process to human induced land use changes, which have affected a wide portion of China since last century, were evaluated with a coupled land surface-hydrology model. The main land use changes were assessed by the International Satellite Land Surface Climatology Project (ISLSCP) historic (1970) and potential land use types in the Huaihe River basin. The variations of flood...
The increasing availability of remote-sensing images, acquired periodically by satellite sensors on the same geographical area, makes it extremely interesting to develop monitoring systems capable of automatically producing and regularly updating forest-cover maps of the considered site. In this paper, we designed and developed new object-based change detection algorithms, which are aimed at updating...
Crop yield estimation models using remote sensing data were developed to forecast crop yield for Hubei province. Firstly, simulated counties were chosen using productivity zoning method, and the fluctuated yield was obtained by analyzing history trend. Secondly, the correlation coefficient between fluctuated yield and remote sensing index was calculated. Then, the index with the highest correlation...
Geographic information system technology has been applied to manage and analyze the citrus production information in the Three Gorges area of China. Massive information related to citrus production management including spatial and non-spatial data are collected from different sources. Taking account of the demands of different end users, the data sets are organized at three scales, i.e. municipality,...
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