Subjects: Geosciences >> Geography submitted time 2023-09-19 Cooperative journals: 《干旱区地理》
Abstract： Soil salt crust has an important impact on soil evolution and ecohydrological processes in arid areas.There are few recent studies on water and salt distribution characteristics in salt-crust soils, and the influence ofsalt-crust thickness is not considered, leading to great differences in research results. Therefore, in this paper, fourinitial salt concentration treatments (0 g·L−1, 10 g·L−1, 150 g·L−1, and 250 g·L−1) were set to obtain different saltcrust thicknesses (4.5 mm, 6.6 mm, 7.3 mm) through laboratory simulation tests, and the soil-profile dynamics ofwater and salt were compared and analyzed using a partial repeated stepwise withdrawal method. The resultswere as follows: (1) Compared with the non-salt treatment, the thicker the salt crust, the larger the soil-profile water content, and the smaller the salt-content variation range. (2) At the end of the experiment, the water contentdistribution characteristics of the 4.5 mm salt-crust soil were similar to those of the unsalted treatment, and thewater contents of the 6.6 mm and 7.3 mm salt-crust soils were significantly higher than that of the unsalted treatment (P<0.05). (3) At the end of the test, the minimum salt contents of the 4.5 mm, 6.6 mm, and 7.3 mm saltcrust soils decreased by 90.5%, 46.3%, and 32.1%, respectively, compared with their initial salt contents. The results confirm that salt-crust thickness has a great influence on the distribution of soil water and salt. Therefore, itis suggested that the influence of salt-crust thickness should be considered comprehensively in future research ondistribution characteristics of water and salt.
Subjects: Geosciences >> Geography submitted time 2023-08-01 Cooperative journals: 《干旱区地理》
Abstract：水分利用效率（WUE）通过联系陆地生态系统碳水循环过程，成为理解植被生态系统对气候变化响应的一个重要指标。结合19902020年的遥感影像与再分析数据产品，基于光能利用效率（CASA）模型反演净初级生产力（NPP）和实际蒸散发（ET）系统分析了19902020年新疆植被WUE的时空变化规律，讨论并探究了影响植被WUE变化的驱动力因子。结果表明：过去31 a新疆植被WUE整体呈下降趋势，但以2003年为转折点，转折点之前呈波动下降趋势，之后呈波动上升趋势。31 a来新疆植被WUE的空间格局没有发生明显变化，高值集中在平原区，特别是绿洲及荒漠-绿洲过渡带，低值集中在山区。通过分析发现，新疆植被WUE变化主要归因于降水、蒸散发及水汽压等气候因子影响。研究结果对于筛选出结构合理、节水性强、生产力高的人工和天然植被结构类型，实现干旱和半干旱地区植被建设的可持续发展具有参考价值，特别是对新疆生态系统安全与农牧业可持续发展具有现实意义。
Subjects: Geosciences >> Geography submitted time 2023-04-07 Cooperative journals: 《干旱区地理》
Abstract： Soil wind erosion is the primary stage and important component of desertification in arid and semiarid regions. Evaluating its possibility and potential risk for wind erosion control at the regional level is of considerable importance. In recent years, remote sensing and geographic information technology are often combined with mathematical methods to build a risk assessment model. However, the current risk models of wind erosion are still lacking in mechanical parameters. This study was conducted in the Hetao Plain of China, which is a typical region of wind erosion and desertification. Soil hardness and shear strength were measured in the field to determine the difference in soil erodibility among different land use types. Wind erosion risk was evaluated using fuzzy logic, analytic hierarchy process, and the weighted linear combination method based on the data of climate conditions, soil physical factors, topography, and vegetation characteristics. Then, the spatial distribution characteristics and causes of different risk areas were analyzed. The following results are presented. (1) The shear strength of land use types shows an increased tendency in the order of sandy land, grassland, woodland, cultivated land, and saline land, which agreed well with the soil hardness. The soil hardness and shear strength of sandy land are 2.05 kg·cm−2 and 10.00 kPa, respectively, which are significantly lower than those of other land use types, indicating that the soil erodibility of sandy land is extremely high. (2) The wind erosion risk varied in spatial distribution. Wind erosion hazard is high in the west and south and low in the eastern and middle regions. Moreover, 27.51% of the total areas are found to be at a high risk of erosion. Thus, soil erodibility and vegetation coverage are essential factors affecting soil wind erosion. (3) The severe risk region is mainly distributed in most of Dengkou County, the edge of the south bank of the Yellow River, Togtoh County, and the east of Wuliangsuhai in the Urad Front Banner. Therefore, this area should be the focus of wind erosion control. The current research demonstrates strong universality and compensates for the shortcomings of existing wind erosion models, which can provide a theoretical basis for regional-scale wind erosion assessment models.
Subjects: Geosciences >> Hydrology submitted time 2023-03-14 Cooperative journals: 《干旱区地理》
Abstract： Based on the runoff data and meteorological data of Laohugou watershed in the western of Qilian Mountains, northwest China, the research analyzed the relationship between runoff and meteorological variables in glacier area, and established a multivariate exponential nonlinear regression to reconstructe the runoff. In addition, the characteristics of interannual, seasonal, diurnal variations of runoff in the glacial region were analyzed. The results showed that: (1) The correlation between runoff and temperature is the highest (0.86), followed by water vapor pressure (0.81), relative humidity (0.46), and precipitation (0.27). Runoff is most affected by temperature. (2) The mean daily runoff is 2.10 m3 ·s -1 in this century, which is higher than 1.65 m3 ·s -1 in the late 1950s, the main reason is that the temperature increased by 0.75 ℃ in the ablation season. The interannual variation of runoff is large in the strong ablation period, and the interannual variation is small in the beginning (May-June) and end (September) of the ablation period. The proportion of runoff generation from May to September was 5.3%, 16.1%, 37.3%, 35.1% and 6.2%, respectively. (3) Multivariate exponential nonlinear regression equation can better simulate the daily runoff (the mean Nash efficiency coefficient is 0.70). After the supplement of the missing runoff, the diurnal variation of runoff is small in the beginning and end of the ablation period, but the diurnal variation of runoff is large in the strong ablation period. For the time-lag effect of runoff, monthly runoff in Laohugou watershed showed a characteristic of diurnal variation of“valley-peak”during the ablation period. The time interval between the maximum temperature and the maximum runoff was long in the beginning and end of the ablation period, while the time interval was short between the maximum temperature and the maximum runoff during the strong ablation period, and the maximum difference between the maximum temperature and the maximum runoff was 3 hours in June.
Subjects: Geosciences >> Hydrology submitted time 2022-12-20 Cooperative journals: 《干旱区研究》
Abstract：
Based on the satellite data, the water level and area information of Lake Issyk-Kul was extracted, and the water volume was reconstruct; combined with CRU meteorological data from 1960-2020, the temperature and precipitation observation data from 1960- 2000 at the Cholpon- Ata meteorological station and the water volume observation data into the lake, the lake water balance model was established to analyze the changing characteristics of each element of the water balance and to explore its influencing factors. The results indicated that: (1) Since 1960, the water volume of Issyk-Kul Lake has undergone a process of continuous decrease and fluctuating increase, with 1998 being the inflection point of the change; from the 1960s to the mid-1980s, the water volume into the lake decreased continuously mainly due to the influence of irrigation diversions, and then turned to an increasing trend after 1986 with the decrease of irrigation water and the increase of precipitation and glacial meltwater; precipitation in the lake area increased at a rate of 9.1 mm·(10a)-1 , and the evapotranspiration tends to increase significantly with increasing temperature and lake area. (2) Before the mid-1980s, Issyk-Kul had a negative water balance in most years, and groundwater continued to recharge the lake; since 1986, the water balance deficit of the lake gradually decreased, and since 1998, the positive balance has been dominated. (3) The interaction of water balance components such as runoff, precipitation and evaporation determines the changes in lake water volume, while climate change in the flow-producing areas and irrigation diversions in irrigation areas indirectly drive the changes in lake water volume by changing runoff; from 1960 to 1986, human activities, mainly irrigation diversions, were the dominant factor driving the changes in Issyk- Kul water volume, with a contribution of 71.6%, and since 1987 the cumulative contribution of climate change factors to changes in lake water volume exceeds 80%.
Subjects: Geosciences >> Geography submitted time 2022-10-21 Cooperative journals: 《干旱区地理》
Abstract：盐渍化是构成绿洲农业低产的主要原因之一，也是农业开发和可持续发展的重要限制因 素。为提高盐渍化耕地生产力，促进绿洲农业的可持续发展，以喀什噶尔绿洲耕地为研究对象，利 用Landsat 8 OLI遥感影像数据提取遥感指数20个，利用土地利用数据计算研究区耕地开垦年限， 用线性拟合的方法将用植被光合作用模型（VPM）模拟的植被净初级生产力（NPP）数据进行降尺 度，将遥感指数同土壤采样及实测数据进行相关分析，得到优选的遥感特征变量，再用粒子群优化 算法（PSO）优化的概率神经网络（PNN）模型进行盐渍化程度分类，得到研究区耕地盐渍化等级分 布情况，后与研究区耕地开垦年限和NPP进行叠加分析。结果表明：（1）选取增强型植被指数 （EVI）、盐分指数2（SI2）、湿度指数（WI）、MSAVI-WI-SI特征空间（MWSI）、波段6（B6，2.11~2.29 m） 5个遥感参量通过PSO-PNN模型进行盐渍化程度反演准确率约为80%。（2）耕地开垦年限越大的 区域盐渍化程度越低。新开垦的耕地主要分布在研究区东部，而研究区西部大都为开垦年限在45 a 以上的老绿洲农业区。（3）耕地盐渍化严重降低了耕地农作物生产力。研究区耕地NPP较高的区 域大都分布在西部，较低的区域大都分布在东部，与盐渍化程度等级分布大致相反。上述研究方 法与结果可为后续使用遥感参量进行盐渍化反演的研究提供参考，对干旱半干旱区的盐渍化耕地 改良具有一定的参考意义。
Subjects: Geosciences >> Geography submitted time 2022-03-28 Cooperative journals: 《干旱区研究》
Abstract：本文基于水文观测和遥感监测数据，获取近60 a巴尔喀什湖面积、水位变化信息，重建湖泊水量变化时间序列，探明巴尔喀什湖水量变化特征；依据湖泊水量收入（入湖径流、降水）支出（湖面蒸发）建立巴尔喀什湖水量平衡模型，分析巴尔喀什湖水量平衡要素变化特征，定量解析气候变化和人类活动对巴湖水量变化的影响。结果表明：（1）19612020年，巴尔喀什湖水量以1987年为拐点先急剧减少后波动增加；入湖径流变化与湖泊水量变化过程基本一致，年均入湖径流量约为14.04 km3a-1；湖区降水以0.28 mma-1的速率波动增加；水体年均蒸发量约17.95km3a-1，其中，1987年最小为16.10 km3，2008年最高达20.30 km3。（2）过去60 a年，地下水与湖泊互为补充，其中20世纪70年代和80年代地下水补给湖泊水量较多，补给量约为1.91 km3。（3）在湖区尺度上，入湖流量与巴尔喀什湖水量显著相关，是影响湖泊水量变化的主导因素；在流域尺度上，气候波动对入湖流量长期变化的贡献率为71.67%，人类活动耗水的贡献率为28.33%；19701985年卡普恰盖水库蓄水及周边耕地扩张对入湖水量锐减的贡献率达47.47%，人类活动明显加剧了这一时期湖泊水位下降的进程。
Subjects: Geosciences >> Geography submitted time 2021-08-11 Cooperative journals: 《干旱区研究》
Abstract：利用“中蒙俄经济走廊”43个省级行政单元2016年的地表水资源量、降水量以及人口、GDP等数据，采用水资源负载指数计算方法，系统分析了该地区水资源分布特征及开发潜力。结果表明：“中蒙俄经济走廊”地表水资源呈“东多西少、北多南少、中减最少”空间格局，其中俄罗斯地表水资源丰富，约占经济走廊地表总水资源量的95%，除人口少、水资源需求相对较小，还具有水资源利用程度低、开发潜力大的特点；蒙古国北部地表水资源较为丰富，其中5个行政区水资源负载指数小于1，具有一定的开发潜力，但南部地表水资源严重短缺；中国东北三省及内蒙古自治区由于人口密度相对较大，水资源需求量大，水资源负载指数均大于2，开发潜力低。从区域水资源优化配置角度来看，蒙古国南部和中国四省（自治区）是需要水资源优化配置的重点地区，而俄罗斯则具有缓解“中蒙俄经济走廊”缺少地区水资源问题的条件。但由于水资源的开发利用与社会经济发展紧密关联，“中蒙俄经济走廊”内的水资源合作路径仍有待于深入研究。
Subjects: Geosciences >> Geography submitted time 2021-04-23 Cooperative journals: 《干旱区研究》
Abstract：基于新疆棉铃虫生物学特性和多年的种群动态趋势，并在收集棉花种植面积、产量、棉花市场价格及棉铃虫防治费用等相关数据的基础上，采用种群模拟模型（CLIMEX模型）并结合随机模拟方法（@RISK软件），评估不同场景下棉铃虫对新疆棉花产业造成的潜在经济损失。棉铃虫种群模拟表明：随着未来气候变化，新疆棉铃虫的周增长指数（GIw）会增加，棉铃虫越冬蛹羽化的日期明显提前，危害风险可能增加；2种模拟场景结果表明，抗虫棉能有效地降低棉铃虫造成的危害，减少单位面积防治成本。建议新疆相关部门未来可通过种植抗虫棉与害虫综合治理策略（IPM）的有机结合，来减少棉铃虫及次要害虫造成的损失。
Subjects: Geosciences >> Geography submitted time 2021-04-23 Cooperative journals: 《干旱区研究》
Abstract：为了探究荒漠草原优势植物对水分和养分输入的响应特征和适应规律，通过设置2个水分水平（自然降雨、水分添加）和3个养分水平（无养分添加、N添加、NPK添加），共6个处理，研究水分与养分添加对荒漠草原优势植物沙生针茅（Stipa glareosa）生长、生理及其敏感性的影响。双因素方差分析结果表明：水分主效应、养分主效应及水分和养分的交互作用对沙生针茅的生长生理特性具有显著影响（P<0.05）。水分添加显著增加了沙生针茅的叶片鲜重、干重、株高和相对电导率，降低了SOD酶活性；养分添加增加沙生针茅的叶面积，N添加增加了丙二醛含量，NPK添加降低了叶绿素a/b（Ca/Cb）和SOD酶活性；水分和养分的交互作用对叶面积、叶片厚度、叶绿素a（Ca）、脯氨酸、蛋白质含量和SOD酶活性具有显著影响。敏感性分析表明，叶面积和Ca含量对同时添加水分和NPK处理较为敏感，而Ca/Cb对水分添加处理更为敏感。综上所述，沙生针茅可以通过改变特定的生长生理特性适应水分和养分的变化，这对于揭示荒漠草原植物对全球变化的响应机制具有重要意义。
Subjects: Geosciences >> Geography submitted time 2021-04-23 Cooperative journals: 《干旱区研究》
Abstract：为研究凋落物在极端干旱区的分解规律，利用凋落物分解袋法，以塔克拉玛干沙漠南缘策勒绿洲地区优势物种花花柴（Karelinia caspia）和胡杨（Populus euphratica）叶凋落物为研究对象，模拟自然状态，分别在3种生境下：土壤表层0 cm、土壤埋深2 cm、悬挂1 m进行凋落物分解试验，探究不同分解位置下的凋落物质量分解和碳（C）、氮（N）元素含量释放特征。结果表明：不同植物的质量损失率在不同分解位置处理下均存在显著差异，土壤表层0 cm处理下凋落物质量损失显著高于悬挂1 m和土壤埋深2 cm。至凋落物分解试验结束，花花柴质量损失率依次为：土壤表层0 cm（19.91%）>悬挂1 m（15.99%）>土壤埋深2 cm（12.35%）。胡杨质量损失率依次为：土壤表层0cm（24.15%）>悬挂1 m（13.44%）>土壤埋深2 cm（8.72%）。在整个分解过程中，两种植物叶凋落物N含量呈富集现象，C含量呈释放状态。在不同分解位置下，N元素富集量和C元素量损失差异显著，土壤表层和土壤埋深2 cm凋落物N元素富集量均小于悬挂1 m凋落物，C元素损失量均大于悬挂1 m凋落物。Olson指数衰减模型对凋落物质量残留率进行拟合，两种植物的分解常数k 值大小排序均为：土壤表层0 cm>悬挂1 m>土壤埋深2 cm。凋落叶质量残留率多因素方差分析表明在不同分解时间和不同分解位置对凋落物质量残留率影响显著（P<0.01）。在极端干旱区，掩埋条件不是驱动凋落物分解的主要因素，影响凋落物分解的因素主要是光降解。
Subjects: Geosciences >> Geography submitted time 2020-12-17 Cooperative journals: 《干旱区研究》
Abstract：松叶猪毛菜（Salsola laricifolia）是典型的荒漠C3-C4中间型植物，隶属于藜科（Chenopodiaceae）猪毛菜属，是研究C4途径进化以及光呼吸减少机制的最佳物种。以松叶猪毛菜无菌苗为试验材料，通过农杆菌介导的瞬时转化方法，分别对质粒载体、苗龄、农杆菌侵染浓度、侵染时间和乙酰丁香酮浓度进行研究，探究各因素对松叶猪毛菜植株瞬时遗传转化效率的影响，以确立最佳的瞬时转化体系；并在上述体系的基础上，过表达松叶猪毛菜叶绿体型NADP-苹果酸酶基因（SaNADP-ME1），通过GUS组织化学染色和荧光定量PCR验证瞬时转化效果。结果表明：（1）采用pCAMBIA1301构建表达载体，以30 d苗龄植株作为转化受体，在侵染液中添加200 μmol·L-1乙酰丁香酮，农杆菌菌液OD600为0.8，侵染6 h条件下，瞬时转化效率最佳（92%）；（2）构建过表达载体并瞬时转化松叶猪毛菜植株，通过染色检测到GUS活性，并且荧光定量PCR检测到SaNADP-ME1的表达量相比对照组显著增高，该基因成功瞬时过表达转化至植株中。综上所述，本试验在松叶猪毛菜植株中建立了一种快速基因功能验证方法，为以后研究松叶猪毛菜功能基因奠定了基础。
Subjects: Geosciences >> Geography submitted time 2020-12-17 Cooperative journals: 《干旱区研究》
Abstract：为了揭示河西内陆河浅山区小流域的蒸散发及干旱特征，以敦煌西土沟流域为例，利用常规气象数据，通过Penman-Monteith公式计算西土沟流域8个观测站点的潜在蒸散发，再此基础上利用双作物系数法计算出各个观测站点的作物系数，由此计算出实际蒸散发，并计算了该流域的SPEI（标准化降水蒸散发指数）。结果表明：（1）西土沟流域年潜在蒸散发量和实际蒸散发量分别为978 mm、258 mm；上游到下游随海拔下降，潜在蒸散发和实际蒸散发随之呈现不同程度的上升趋势；（2）该流域下游干旱持续时间较长，整个生长季都会出现不同程度的干旱，秋季是干旱发生的主要季节；（3）流域上游的降水量大于实际蒸散发量，中下游实际蒸散发量大于降水量；（4）利用NDVI值计算的作物系数Kc值在实际蒸散发的估算中有较好的适用性，在内陆河浅山区小流域的干旱评估中，干旱指数SPEI比SPI（标准化降水指数）和PDSI（帕尔默干旱指数）指数更有优势。本研究计算出了西土沟流域的潜在和实际蒸散发，并评估了该流域的月尺度及季节尺度的干旱特征，为该流域特别是中下游的生产生活用水提供指导，并得到适用于整个河西内陆河浅山区无资料河流的普适性规律。
Subjects: Geosciences >> Geology submitted time 2020-03-26
Abstract： "
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Geology submitted time 2020-03-26
Abstract： " "
Peer Review Status:Awaiting Review
Subjects: Geosciences >> Geochemistry submitted time 2020-03-26
Abstract： Water-rock (soil) chemical interaction (CWRI) is of special significance in the formation process of rainfall induced landslide. On the one hand, rain erosion will cause damage to rock and soil mass, on the other hand, it will generate a large number of secondary clay minerals. The main reason for the formation of the sliding surface is the decrease of the shear strength of the sliding surface caused by the corrosion damage and the enrichment of secondary clay minerals in the sliding surface. In this paper, a high pressure open flow system is used to simulate the chemo-mechanical environment of the sliding surface. Taking calcite and montmorillonite as examples, the rate and controlling factors of the dissolution reaction of the minerals on the sliding surface are studied, so as to reveal the formation mechanism of the sliding surface and its chemo-mechanical process. The results show that: 1) the dissolution rate of minerals increases with the increase of pressure, but the response of different minerals to pressure is different; 2) with the decrease of pH value of solution, the H + activity increases gradually, and the dissolution rate of minerals increases significantly; 3) the flow rate effect of mineral dissolution is very complex, which is related to pressure, pH and mineral species; 4) the dissolution of minerals does not meet the stoichiometric relationship. The above experimental results show that the dissolution on the sliding surface is closely related to the damage of soil and the evolution of the strength of the sliding surface. The depth of the sliding surface, the types of minerals and the acidity and alkalinity of groundwater jointly determine the dissolution rate and transformation characteristics of the minerals on the sliding surface. The increase of the depth of the sliding surface or the increase of the soluble minerals accelerates the formation of the sliding surface. The increase of the acidity of groundwater will accelerate the water rock reaction rate, and thus accelerate the decrease of the strength of the sliding surface.
Peer Review Status:Awaiting Review
Subjects: Geosciences >> Atmospheric Sciences submitted time 2019-11-14 Cooperative journals: 《干旱区研究》
Abstract： 潜在蒸散发在区域水量平衡、干旱程度评价、农作物需水量等方面的研究中具有重要的作用。然而，潜在蒸散发的空间化处理一直以来都是相关研究面临的一个挑战。基于新疆地区1960—2017年66个气象站的观测数据，通过一种简单的参数方程，实现了潜在蒸散发（ET0）的空间化处理。研究结果表明：① 简化参数方程中的2个重要参数a，c的空间分布呈现一定的规律，参数a在空间上呈现东南高，西北低的特点；参数c则随海拔的增加而增大。② 简化参数方程与Penman-Monteith方法相比，拟合结果在日、月和季节尺度上的R2值均大于0.90，且R2值随时间尺度的增加而增加。③ 将简化参数方程的拟合结果与CRU数据和MOD16A2数据进行对比发现：简化参数方程与Penman-Monteith方法拟合的R2值较高，拟合效果和偏差指标表现更佳，而CRU、MOD16A2数据拟合的R2值较低。简化参数方程所获得的潜在蒸散发精度高且空间分辨率更高（500 m×500 m），是一种适用于新疆地区潜在蒸散发估算的简便有效的方法。
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区地理》
Abstract：通过将基本公共服务作为一种民生资源，从失配视角研究其配置问题，运用熵值法和健康距离模型，分析乌昌地区2007—2016年基本公共服务失配度时空格局及其影响因素，为推进乌昌地区基本公共服务均等化建设提供决策依据。研究发现：乌昌地区8个市县基本公共服务失配度的平均值逐渐减小，2007年为0.759，属于高度失配，2016年为0.573，属于低度失配；2007年高度失配市县占比高达87.5%，2016年，基本公共服务配置较高、高度失配的市县占比仅为25%，整体上各市县基本公共服务状态有所提高，但2016年基本公共服务失配市县占比仍高达75%，说明乌昌地区仍有较多市县基本公共服务不协调。时间上，基本公共服务失配度演化主要经历3个阶段：高度失配主导阶段（2007—2011年）、失配度下降过渡阶段（2012—2014年）和中度失配主导阶段（2015—2016年）。空间上，基本公共服务失配度由均衡高度失配逐渐演进成不均衡中低度失配，并呈现出“核心、两翼”格局，“两翼”基本公共服务大多处于高度失配和较高度失配状态，而“核心”则一直处于良好或优秀状态，在变化趋势上，失配度由“核心”向“两翼”逐渐变化，离“核心”越近的市县基本公共服务失配度越早呈现下降趋势。
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区地理》
Abstract：基于自然与人文多重栅格数据，构建人居环境质量综合指数评价模型，分析2015年关中平原城市群人居环境的空间分异格局，并对人口分布与人居环境质量的协同性进行探讨。结果表明：(1)人居自然环境呈现出自东向西，由山地、高原向平原、谷地依次递减的空间分布格局，受地形影响最为明显，地形起伏度与人居自然环境呈负相关关系。(2)人居人文环境表现出平原低、山区高，城镇高于乡村的空间分布格局，受城市行政层级影响显著。(3)关中平原城市群人居环境综合质量指数介于0.216～0.716之间，呈现出以关中平原、汾河谷地向外梯级递减的带状空间分布格局。(4)关中平原城市群人口密度与人居环境质量空间分布显著一致，总体呈现出平原高于山地，城市高于乡村的空间分布规律，人居环境质量越高，人口密度越大，土地利用也越充分。
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区地理》
Abstract：利用泰尔指数、σ系数、莫兰指数和空间回归模型等方法，对2012—2017年中国大陆346个市域单元收入房价比的时空演变规律进行分析，并探究其影响因素。结果表明：2012—2017年，中国市域单元收入房价比排名整体表现为东部>中部>东北>西部，其相对差异和绝对差异均随时间呈现增大趋势，居民住房支付能力稳步增强。2012—2017年，中国市域单元收入房价比的空间集聚性显著增强，空间分布不均衡性有逐渐增强的趋势。经济水平、城镇化水平、房地产投资水平、城市规模是影响中国市域住房支付能力的主要影响因素，其中，经济水平和城镇化水平对居民住房支付能力具有较大的正向影响，而房地产投资水平和城市规模为负向影响；2012—2017年我国东北和东中西部则不同程度上受不同影响因素的影响。
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