Analysis of urban development and land use change in Yiwu city

This section focuses on the main features of the land use structure development in Yiwu urban area (Choucheng Township) during the 18-year period, based on the investigation of land use change for urban construction based on the airborne remote sensing data in two time phases of 1981 and 1999. Tables 8.9 and 8.10 and Fig. 8.41 show the statistical results of land use changes in the urban area, and Fig. 8.42 to Fig. 8.47 indicate the sources of land for the development of six areas, namely, commerce and services, housing, public infrastructure, public **** construction, industry, mining and warehousing, and transportation.

Table 8.9 Comparison of land use in Yiwu urban area (Choucheng Township) in 1981 and 1999 (unit, km2)

Table 8.10 Structural change of urban land use in Yiwu urban area (Choucheng Township) from 1981 to 1999

Figure 8.41 Histogram of structural change of urban construction land use in Yiwu city from 1981 to 1999

Figure 8.42 Sources of commercial and service land use in Yiwu City from 1981 to 1999

The vertical coordinates in the figure are logarithmic coordinates, which indicate the area of land classes. The change of land class in the horizontal coordinate indicates from which land class the land use was changed

(expressed in land class code, see Table 8.1), and the number corresponding to the land class code indicates the area of the change in km2

Figure 8.43 Sources of Land Use for Industry, Mining and Warehousing in Yiwu City, 1981-1999

The vertical coordinates of the figure are in logarithmic coordinates, and it indicates the area of the land class. The change of land class in the horizontal coordinate indicates from which land class the land was changed

(expressed in land class code, see Table 8.1), and the number corresponding to the land class code indicates the area of the change in km2

Figure 8.44 Sources of land for public utilities in Yiwu City from 1981 to 1999

The vertical coordinate in the figure is a logarithmic coordinate, which indicates the area of the land class. The change of land class in the horizontal coordinate indicates from which land class the site was changed

(expressed in land class code, see Table 8.1), and the number corresponding to the land class code indicates the area of the change in km2

Figure 8.45 Sources of land used for public **** building in Yiwu City from 1981 to 1999 (see Fig. 8.21 for illustration)

Figure 8.46 Source of land used for public utilities in Yiwu City Source of residential land use from 1981 to 1999

The vertical coordinates in the figure are logarithmic coordinates, indicating the area of the land class. The land class variation in the horizontal coordinate indicates the land class from which the site was varied

(expressed in land class code, see Table 8.1), and the number corresponding to the land class code indicates the area of the variation in km2

Figure 8.47 Sources of Transportation Land Use in Yiwu City, 1981-1999

The vertical coordinate in the figure is a logarithmic coordinate, indicating the area of the land class. The change of land class in the horizontal coordinate indicates from which land class the land use has changed

(expressed by land class code, see Table 8.1), and the number corresponding to the land class code indicates the area of the change in km2

8.7.2.1 Development and change of land use for commercial and service industries

In 1981, 21 years ago, the then Yiwu County City was only a small town with a built-up area of less than 4km2 , and the county's building land area was only 7.3839km2 (Tables 8.9 and 8.10). Figure 8.40 shows that at that time only in the north-west of the embroidery lake, between the city hall and the north and south of Workers West Road and Workers West Road north and south sides of a few pieces of commercial land, an area of only 0.0251kmz, only for the time of the city's total area of land for construction of 0.34%, can be seen at that time, completely to see the characteristics of the city of the main commodity circulation services.

Figure 8.40 Aerial Remote Sensing Interpretation of the Current Situation of Urban Land in Yiwu City in 1981 The land class in the figure is expressed according to the 2-level classification in Table 8.1

By 1999, Yiwu City had undergone radical changes, and the area of urban construction land had expanded to 27.753km2, of which the area of land of the county city of Choucheng for commercial and service industries was 1.1533km2, mainly concentrated in the urban area, and the area of commercial and service areas was 1.1533km2, mainly concentrated in the urban area. km2, mainly concentrated in the middle and north of the city, China Commodity City, Binwang Market, Zhezhong Timber Market, Yiwu Material Market and Yiwu Agricultural and Trade City, etc., accounting for 6.55% of the total area of urban construction land. In addition, there are some mixed commercial and residential buildings with one floor for commercial use and the above floors for residential use, with a land area of 0.6994km2 (see Table 8.9, Residential Land Use in Category 252). Yiwu City, the commercial land area is not only a large proportion of land in the urban area, and commercial land use of various land use functional blocks are very obvious characteristics, effectively forming a scale market effect, far from the old traditional Chinese one-family small workshop production mode, out of a successful road of small commodity development, production and sales with Chinese characteristics.

8.7.2.2 Development and Change of Industrial, Mining and Warehousing Land

From the aerial remote sensing imagery interpretation map in 1981 (Figure 8.40), it can be seen that at that time, the area of industry was much larger than that of commercial land use, and the industrial, mining and warehousing land use in the scope of the remote sensing interpretation area was 0.7964km2, among which, as the seat of the county, Choucheng Town's industrial, mining and warehousing land use area was 0.4886km2, which was 0.4886km2. 0.4886km2, accounting for 13.12% of the construction land of the county at that time (Table 8.9, 8.10), mainly brick kilns, various types of processing factories, cement machinery factories, etc., of which the brick kilns are far away from the county town of Yiwu at that time and the main road, with a larger scale of the land, and cement machinery factories are distributed in the northern part of the county town next to the main highway at that time. In general, the distribution of industrial, mining and warehousing land is relatively messy.

After 18 years of development, on the 1999 aerial remote sensing image interpretation map (Figure 8.39), it can be found that Yiwu's industrial development is not what it used to be. First of all, the neatly constructed industrial warehousing land in terms of scale has basically occupied most of the western half of the main urban area of Yiwu City, forming a half-enveloping situation to the main urban area of Yiwu City. The area of industrial warehousing land in Choucheng Town reaches 1.8296km2, although the proportion of the construction land area in the county declined from 13.12% to 10.40% in 1981, but in terms of area it increased 274.46% compared with that of 1981. The area of industrial, mining and warehousing land within the area covered by the aerial film reaches 1.8296km2. It can be seen that Yiwu's prosperous commodities market is linked to the scale of its well-developed commodities processing and warehousing facilities. Secondly, there is basically no industrial, mining and warehousing land type in the main city of Yiwu and the south bank of Yiwu River, reflecting that the modern Yiwu City pays great attention to urban environmental protection and construction in planning and construction, and isolates the industrial, mining and warehousing land from the residential and living areas as much as possible.

8.7.2.3 Development and Change of Utilities Construction Land

The scale of utilities and their spatial distribution play a significant role in the environmental impact of a city, which is closely related to the level of economic development of a city. For Yiwu, a commercial city with beautiful mountains and rivers, the construction of public utilities has good geographical conditions. But in 1981, Yiwu's public facilities construction only a lake, and its east side of the Daan Temple Tower monument and the present workers West Road and the new road junction of a small blister. At that time, the embroidery lake is not a park, but only a small lake in the county, an area of only 1.5 × 104m2, there is no supporting utilities around it. Indicates that at that time Yiwu County Government did not have the economic strength to plan and build public facilities in Yiwu. To 1999, Yiwu City Government and the people to develop a small commodity economy with the enthusiasm and vigor for the construction of public facilities, so that both sides of the Yiwu River into a beautiful garden along the river, the embroidery lake park area than in 1981 expanded by 5.2 × 104m2, and is the east side of the demolition of several dozens of old-style homes and other buildings, the new area of nearly 10 × 104m2 Citizen's Square, the face of the center of the city has undergone a The appearance of the center of the city has changed fundamentally. In addition, in the workers West Road North built an area of about 2.7 × 104m2 of Luo Binwang Park, the city in the North Road East built an area of more than 4 × 104m2 of filial piety shrine park, Chouzhou in the south of the construction of more than 4.6 × 104m2 of the Chouzhou Park, so that the entire downtown area of Yiwu in the rich world of small commodities added full of vitality in the natural beauty of the 18 years of development has led to the development of Yiwu by the In 1981, only 0.0263km2 of land for public utilities increased to 1.2253km2, an area increase of 46.59 times. This is a very admirable and marvelous figure. From the Yiwu planning blueprint (Yiwu City Survey and Design Institute, Yiwu City Scenic Tourism Administration, 2002), the future of Yiwu City must be more beautiful than today.

8.7.2.4 Development and Change of Public **** Building Land

In 1981, the area of public **** building land within the urban area of Yiwu was 0.2598km2 (Tables 8.9 and 8.10), which accounted for 6.98% of the total area of urban building land. On the 1999 aerial remote sensing land use type interpretation map (Fig. 8.39), there are more than 10 universities, junior colleges, middle and small schools with land area of more than 4×104m2 distributed around the urban area in a nearly uniform state. In addition, Yiwu Paradise, Yiwu Sports Center, Yiwu Convention and Exhibition Center, Yiwu Central Hospital and a number of other public **** buildings have a considerable scale, are playing an increasingly large role in the healthy and rapid development of Yiwu. Statistics show that in 1999, the total area of land used for public **** construction amounted to 1.8530km2, which is 7.1 times of that of 1981, and accounted for 10.53% of the total area of land used for construction in the county in 1999.

8.7.2.5 Development and Changes of Residential Land Use

The condition of the residence can well reflect the economic development level of a city. As can be seen from the aerial remote sensing image map in 1981 (Figure 8.40), the construction land area of the urban area of Yiwu County at that time totaled only 3.7239km2 (Tables 8.9 and 8.10), and the main body of the old urban area was bounded by the present Chengzhong Road, with low-rise houses densely distributed in the area north and west of Chengzhong Road, and the residential layout in the city was mostly near-north-south oriented with the old typical small quadrangle housing occupying a large proportion. This may have something to do with the fact that Yiwu City has 22 years of history. This may be closely related to the long history of Yiwu City with more than 2200 years. To the north direction, the industrial, mining and warehousing buildings obviously increased. At that time, the residential land area of Choucheng Town was about 2.3129km2, accounting for 62.11% of the total land area of the old county town, which shows that the crowded old county town at that time was poor in terms of both the housing environment and the housing space.

On the 1999 aerial remote sensing image map (Fig. 8.39), the residential land area of Yiwu urban area amounted to 7.3843km2 (Tables 8.9 and 8.10), which is 3.2 times more than that of 1981, but the proportion of the construction land in the urban area dropped to 40.39%. The urban buildings are neatly planned and surrounded by new-style residential neighborhoods and large-scale commodity trading markets and other building complexes bounded by main roads, which makes Yiwu city obviously different from the urban building development pattern of Ningbo city. In addition, because the new residential district or commodity trading market in Yiwu are all based on the block form between the main roads to determine the direction of the buildings, so the orientation of the residential and commodity trading market and other building complexes in Yiwu changes regularly from southwest to southeast, reflecting the characteristics of Yiwu city planning and construction according to local conditions, while in Yiwu Jiangnan bank residential construction layout is mainly south-facing.

8.7.2.6 Development and Change of Transportation Land

On the 1981 aerial remote sensing image, Yiwu City did not have a wide and straight city street between the low and crowded residences in the main city, except for Chengzhong Road, which extends from the southeast edge of the main city to the north and south leading to Jinhua and Hangzhou, and the Xinmajie and Danxi Roads in the community of Tonghui (see Fig. 8.40).In 1981, the area of transportation land in the city was 0.6 million square meters. The area of land used for transportation in the urban area was 0.6304km2 , accounting for 16.2% of the total built-up land area at that time (Tables 8.9 and 8.10). By 1999, the area of urban transportation land had expanded to 4.1450km2, accounting for 23.56% of the total area of urban construction land, and the area of land had increased by 6.6 times compared with that of 1981 (Tables 8.9 and 8.10). Taking Yiwu Citizen Square as the center, the wide and straight streets extend outward uniformly in a radial shape, and a typical spider-web urban transportation system connects Yiwu City organically (see Figure 8.39).

From Fig. 8.41 to Fig. 8.47, it can be seen that in the development process of Yiwu urban area from 1981 to 1999, the urban construction land mainly comes from cultivated land and residential land converted through the transformation of the old city, industrial, mining and warehousing land.