By analyzing the characteristic of urban agglomeration areas, proposing that considering the mobility of resource is essential in researching carrying capacity, the research used core cities of Central Henan urban agglomeration as cases to study, referencing press-state-response model to build the target system of carrying capacity, considering resource supply and consumption & environmental pollution and treatment, using AHP method to evaluate. Reliant exponential is used to evaluate the dependence severity. The result shows that according to the comparison of two results considering resource fluidity or not in Zhengzhou in 2004?2014, only considering resource fluidity can reflect the real condition of an area. Core cities of Central Henan urban agglomeration are short of water and energy resources but are enough to use with the supply of external resources. The orders of the carrying capacity index on resource and environment are Luohe, Xuchang, Xinxiang, Zhengzhou, Jiyuan, Jiaozuo, Luoyang, Pingdingshan and Kaifeng. According to the reliant exponential of external resources, grain resources in these nine cities are self-sufficiency. External energy resources are needed in Kaifeng, Xinxiang, etc. External water resources are needed in Zhengzhou, Kaifeng, etc. More external water resources are needed than external water resources.

The research mainly focused on effects of long-term addition of lead on performance by physicochemical index and stability of aerobic granules sludge system. Results show that removal of phosphorus was affected significantly when the theoretical concentration of lead was 10 mg/L, and the removal efficiency decreased from 50% to 28%. When the concentration of lead had a further increasing, the phosphorus removal rate declined further, and finally maintained at about 18%. Removal efficiency of NH4-N began to decline when the theoretical concentration of lead was up to 50 mg/L, and finally maintained at about 80%. At the same time, the MLSS decreased, SV30 increased, SVI rose sharply, aerobic granular disintegrated gradually and settling charac- teristics deteriorated; but removal of COD increased from 87% to 93% within the range of 1?50 mg/L.

Two classification methods of soil erosion intensity are set by the Ministry of Water Resources of PR China. One is direct index method which takes soil erosion modulus or annual soil erosion thickness as the classification index. The other is indirect index method which takes some earth surface factors influencing soil erosion as the classification index. In practice, the indirect method is usually adopted because of its convenience in data collection. Based on the rapid assessment method of soil erosion proposed in the authors' previous study, the soil erosion intensity is assessed for the Yellow River basin by using the indirect method. Comparing the assessment results with the investigation results, the applicability of the indirect index method is analyzed, providing reference for the application of the indirect classification method of soil erosion intensity.

Land resource is one of the irreplaceable resources that human beings rely on. It is not only the main component of our environment, but also the carrier of other natural and social resources. Based on an overview of the worldwide research background for optimization of land use structure, the authors analyze the logistic framework of the optimal procedure and compare various kinds of relevant models. As a result, advantages and limitations in applications of the models are revealed. Meanwhile, significance of multi-objective optimal model in land use structure optimization application and scarce of land use spatial structure optimization are indicated.