未耕地

According to calculation of obstacle degree, the obstacle factor of sustainable land use was analyzed in detail. The factors such as per capita agricultural gross output value, per unit area yield of grain, reed land rate, agricultural land rate and degree of townish are the main obstacle factor ofKey words: land use; sustainability; obstacle degree; The Yellow River Delta

研究结果表明：在34个因子中人均农业总产值、粮食单产、芦苇地占地率、农业用地率、城镇化水平是黄河三角洲可持续土地利用的主要障碍因素，其中芦苇地占地率在1996年以后始终是第一障碍因素，而人均农业总产值的限制主要出现在1998年之前，之后对可持续土地利用未构成障碍；粮食单产和农业用地率的影响主要出现在1996年以后；林草覆盖率、公顷耕地农机总动力和农村电气化水平在一半以上的年份对可持续土地利用构成障碍；在1994年之前，农民人均收入障碍度较大，是主要的障碍因素。

Land use changes become meeker, with less changing range.

耕地、草地与未利用土地面积略有增加。

The base map is the land use map from TM image of 2000. Land use type is redivided into 6 types,-(1) Field,(2)Woodland,(3)Grassland?(4)Water area,(5)City and Town,(6)Unused area. And 7 kinds driving factors, which represent import contribution to LUCC in this area were chosen.

模型采用2000年黑河流域TM图象解译的土地利用图，将其转化为grid格式，每个grid代表面积为1km~2，将土地利用类型合并为：(1)耕地，(2)林地，(3)草地，(4)水域，(5)城镇用地，(6)未利用地。

In this paper, the land use was classified into eight types, namely forest land, bush land, sparsevegetation land, water land, construction land and unused land.

将土地利用类型分类为耕地、有林地、灌木林地、草地、迹地、水体、建设用地和未利用地8类。

Jilin, one of China's main grain-growing areas, is still suffering a severe drought, which is threatening more than 60% of fields in the province.

我国粮食主产区吉林省旱情仍未缓解，受旱面积占全省耕地面积的60%以上。

The results indicate that the cultivated land was the primary type, the proportion of unused land and secondary saline habitat were much bigger, the proportion of residential and mining land increased quickly, and the conflict between the producing-construction of oilfield and eco-environment conservation was keen-edged in the recent ten years.

研究结果表明：耕地是东营市主要的土地利用类型，面积有所减少；未利用地和次生盐碱地所占比重较大，居民点及工矿用地大幅增加，油田生产建设和生态环境保护矛盾非常突出。

Currently, our existing unutilized land for the cultivation of arable land could be developed only 40 million mu.

目前，我市现有未利用土地中可开发复垦为耕地的仅有40万亩。

The results suggested that from 1996 to 2005, the area of cultivated land, forest land, grass land and unutilized land in Conghua City decreased, while the area of garden land, construction land increased. The total ecosystem services value in Conghua City increased by 0.0690×10^8 Yuan, and the rate of increase was 0.21%.

结果表明，1996-2005年从化市土地利用变化的总体趋势是耕地、林地、牧草地和未利用地面积在减少，园地、建设用地和水域面积在增加；从化市生态系统服务总价值增加了0.0690亿元，增加率为0.21%。

Haifeng County, Luhe County, hosted Lufeng and a Red Bay Development and the Overseas Chinese Economic Zone Management Area, are Under the jurisdiction of city, which is with a total population of 3.23 million, urban population of 210,000, living abroad overseas Chinese, Hong Kong Macao and Taiwan compatriots, a total of more than 130 million people; total land area of 5271 square kilometers, accounting for 2.93% total area of the province, of which 93.2 thousand hectares of cultivated land, garden 42.1 thousand hectares, woodland 234.8 thousand hectares, unused land 47.9 thousand hectares; a coastline of 455 kilometers, sea area of 23.8 thousand square kilometers, accounting for the province's land area 14% of the ocean, in which shallow seas and tidelands 69.6 thousand hectares.

下辖市城区、海丰县、陆河县，代管陆丰市，并设有红海湾开发区和华侨管理区两个市辖经济区，总人口323万，市区人口21万，旅居海外华侨、港澳台同胞共有130多万人；陆地总面积5271平方公里，占全省总面积2.93％，其中耕地面积9.32万公顷，园地4.21万公顷，林地23.48万公顷，未利用地4.79万公顷；海岸线长455公里，海洋面积2.38万平方公里，占全省海洋国土面积的14%，其中浅海、滩涂6.96万公顷。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。