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This paper uses a double bounded dichotomous choice(DBDC) contingent valuation method(CVM) to estimate the willingness to pay(WTP) for water quality improvement of the Yangtze River in Nanjing in China. To improve the validity, special attention is paid to the issue of zero responses, and a Spike model that allowed for a non-zero probability of zero WTP is applied. Results indicate that there are...
Extreme weather events over Pakistan have been increasing. This is contributing to the ever enhancing human suffering of the region. The present study investigates the extreme rainfall in Pakistan by using General Pareto Distribution (GPD) method. This in turn is used to analyze extraordinary rainfalls of summer 2010. The results indicate that during the summer 2010 northwestern parts of Pakistan...
Spaceborne Radar Interferometry (InSAR) is well known as an accurate, time saving and low cost technique for monitoring of surface deformation phenomena ranging from land subsidence, volcano displacement, tectonic motion and even slow landslides. The Coherent Point Target SAR Interferometry (CPT-InSAR) overcomes atmospheric delay anomalies and the temporal and geometric decorrelation by the interferometric...
Based on the practical characteristics of urban network management, this paper discusses the necessity of underground pipe net database design and the detailed process of how to establish the database, the authors put forward the design scheme that based on the data acquisition and procedures of editing, in the end, this paper realizes the design requirements, the establishment of the database can...
The concept of potential for natural ventilation (NVP) is defined as the possibility, or probability, to ensure both indoor air quality and thermal comfort by natural ventilation. NVP value can provide the designers significant information to properly design and arrange natural ventilation strategy at the preliminary or conceptual stage of ventilation and building design. In 2005, Lina Yang presented...
In this work we mapped the spatial and temporal patterns of the land subsidence near the city of Hangzhou, China by PSI analysis with 49 scenes of ERS-1/2 SAR images acquired from 1992 to 2006 to detect and retrieve the subsidence due to economic development. The main reason of land subsidence in Hangzhou is groundwater exploitation, which is necessary for the rapid economic development, especially...
Longmen Shan tectonic belt located in West Sichuan Plateau, which keeps the good forests outlook and provides a unique natural environment for the growth of medicinal plants because of its unique geological features. It is a area that is one of the most abundant biological diversity in China and the whole world range, and also is the one of the most concentrated area of the origin of Chinese herbal...
The Permanent Scatterers (PSs) SAR Interferometry has become an operational tool in the context of spaceborne SAR interferometry for monitoring surface deformation with millimetric accuracy. In this contribution we presented a case study in Xi'an city for land subsidence monitoring and ground fissures detection by using PS InSAR. We applied a linear regression model to retrieval land subsidence velocity...
Spaceborne SAR interferometry (InSAR) is a well known microwave remote sensing technique which has been applied for topography mapping and ground motion monitoring by exploiting phase difference from SAR data acquisition with relevant large spatial scale and high precision. The developed Permanent Scatterers Interferometry (PSI) is a further step of InSAR technique which offers a convenient processing...
The saving city (SC) evaluation is an important means to promote the construction process of saving city. According to the concept and characteristics of the SC, following the scientific, practical and operational principles, taking the present situation of our country into consideration, the paper firstly puts forward an evaluation index system for SC, which includes 4 levels, 3 subsystems and 25...
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