Stuty On Early-Warning Of Land Ecological Security In Zhengzhou City

Use of land resources and human activities increasing, land ecological environment is increasingly being destroyed. Thus, land ecological security gradually been put on the agenda, land ecological security research has become the forefront of a more important topic of current research. Although the study of land ecological security is constantly evolving, but still in the initial stages of research, related research is not a lot of land ecological security evaluation theory is still in the exploratory stage, the evaluation index system, research methods is still a thorny issue.This paper studies draw on research and related land ecological security warning has to Zhengzhou City for the study, combined with gray prediction model and land ecological security evaluation method, the warning theory into the field of land ecological security research, land ecological security status of Zhengzhou City, according to construct the evaluation index system of land ecological security of Zhengzhou City, Zhengzhou City,2003-2011 by basic data, such as dimension and new information using gray GM (1,1) model-based data collection extrapolation forecast, drawn 2012-2016 forecast data for the year, method and systematic method to determine the absolute division of early warning and alarm limits according to various criteria integrated use of expert opinion, the police identified as the giant, heavy police, the police, police light, no police and other five basic levels, finally using entropy method and comprehensive evaluation of index data to evaluate research in 2003-2016, and the results of the evaluation in the form of warning lights show up, appear in Zhengzhou specific analysis of police intelligence.Summarizes the reasons for land ecological security police intelligence, and propose appropriate countermeasures can be implemented, so that the land situation has improved, preventing land degradation.The main conclusions of this study:(1) Zhengzhou City in 2003-2016 years, land ecological security alarm Composite Index showed a moderate increase after the first decline in the trend, basically in between the police and the heavy police. Between 2003 an 2008, the land ecological security index fell to 0.455 to 0.391, basically in a heavy police interval; According to forecasts 2012 to 2016 in the overall police range. (2) under the combined effect of three subsystems, Zhengzhou City, the land ecological security in 2003-2011 Composite Index dropped 0.06 years; land ecology economic and ecological security subsystem and the subsystem is rising, while decreasing the social system of land trend. (3) 2003-2016 in Zhengzhou City land ecological security alarm experienced a heavy police-the police-Light Police-Police in the process of change, although somewhat improved, but is still in the police state, there are still many problems. According to the analysis of Zhengzhou City shall take appropriate measures:further strengthening of Zhengzhou City eco-city construction and environmental protection, strictly control the population and improve the level of intensive land use, the transformation of economic growth pattern and the development of circular economy.