Current Land Use Maps Research Articles

Estimation of greenhouse gas emissions from rice and annual upland crops in Red River Delta of Vietnam using the denitrification–decomposition model

Abstract This study used the denitrification–decomposition (DNDC) model and ArcGIS 10.1 to calculate and quantify the greenhouse gas (GHG) potential from rice and annual upland crops in the Red River Delta of Vietnam. GHG emissions were monitored, analyzed, and calculated at experimental sites. The operating mechanism, sensitivity analysis of the parameters, calibration, and verification of the DNDC model for the GHG emission calculation were studied and performed, and a set of parameters was built. A good correlation between actual and simulated values was shown. From the data set of meteorological stations in and around the Red River Delta, the current land-use map, the topographic and soil map, a complex map of meteorology–soil–land use was built. Each unit of this map contains complete information about climate, soil, and crops as input data for modeling GHG emissions from crop production. From the spatial analysis and collected input data, GHG emissions were measured and calculated for the cultivated field of the Red River Delta (annual rice and upland crops) using the DNDC model. The model's outputs were used to build thematic maps on the distribution of global warming potential (CH4, N2O) for each unit of the complex map of climate, soil, and crops.

Portland's Post-Industrial Neighborhoods

Reimagined, remediated, and redeveloped former industrial lands are now thriving mixed-use neighborhoods in Portland's Pearl District and South Waterfront. Places of physical labor have been transformed into spaces where a new class of knowledge workers live, work, and play. This paper argues that inner-city post-industrial neighborhoods offer a valuable lens through which to view key transformations in cities and in the wider society. Using historic and current land-use maps in a geographic information system, we identified the major post-industrial areas of Portland. We then used demographic data, business location data, and planning studies to find the stories behind these places. In the shadow of lost manufacturing jobs and the changing location of heavy industry, the emergence of postindustrial neighborhoods reflects a growing emphasis on cities as centers of consumption, livability, and sustainability. The demographics of these new post-industrial neighborhoods signal the return to the inner city by highly educated, high-income residents.