Study on Natural Disaster Prevention Countermeasures for Western Valley City from the Perspective of City Planning: A Case of Lanzhou City

Abstract

For a long time, the Western Valley Cities (WVC) had suffered serious threats from several natural disasters, and integrated prevention natural disasters has been a primary issue to their sustainable development and inhabitation environment construction. As a significant public policy for conducting city development and guaranteeing public safety, city planning serves an irreplaceable function in WVC natural disasters integrated prevention. Take Lanzhou city as a WVC example, the paper firstly analyzing its main natural disasters that include earthquake, flood, sandstorm and geological disasters. Further, it systematically summarizes their four typical characteristics, which are forceful relevance with geographical environment, higher disasters continuous occurrence, stronger amplifying nature of disaster losses and higher costs and difficulties of rescues and reconstructions. Finally, from four aspects that are improving legal status of disasters integrated prevention planning, establishing a rational optimal allocation model of city land-use, building a multilevel natural disaster prevention system and constructing prevention disaster communities, it puts forward natural disasters integrated prevention countermeasures for WVC based on the perspective of city planning.

Assessment of Geohazards and Preventative Countermeasures Using AHP Incorporated with GIS in Lanzhou, China

“…To avoid deterioration, regular slope maintenance is essential. Effective strategies to guarantee slope stability against landslides are: revising slopes to reduce the inclination of the slope from steep to gentle; constructing retaining walls (for example, reinforced earth or concrete walls); providing anchors (for example, soils and pre-stressed anchors) to reduce slop failures; providing effective drainage systems; and compacting loose fill slopes [72,73]. The rest of this section discusses detailed countermeasures to mitigate landslides accompanied debris flows, since these geohazards are common in Lanzhou City.…”

Variation Feature, Pollution Risk Assessment, and Source Analysis of Heavy Metals in Lanzhou City, Northwestern China

“…Later, the pollution of heavy metals was gradually increased with rapid urbanization and industrialization that has been occurring since the 2000s [3,4]. Lanzhou city was once ranked as one of the top cities polluted by heavy metals in China ( [8,9]; Figure 1). Studies on the pollution characteristics of heavy metals in Lanzhou have been conducted a decade ago [5,6,10,11].…”