... The occurrence of steep slopes. … In the last 2.6 million years, the paleomonsoonal history may be divided into about 166 events on a time scale of the Earth's orbital variations. The Loess Plateau was formed in waves between 2.4 and 1.67 million years ago, helped along by the uplift of the Tibetan Plateau, the movements of several huge glaciers across desert. After recalibration the LISEM model simulated measured discharge and sediment yield only slightly better than before. China's Loess Plateau is both the largest and deepest loess deposit in the world, and it has long been one of the most severely eroded areas on Earth. Name * Email * Website ← After Restoration, Loess Plateau, China. We drove for hours and hours across the Chinese Loess Plateau, one of the largest loess deposits in the world, covering an area of 640,000 km 2, having formed over millions of years. In ecological migrants, farmer’s adaptability are the main manifestations of the effect and quality of the migration of migrants. Found insideSoil Degradation, Restoration and Management in a Global Change Context, volume four in the Advances in Chemical Pollution, Environmental Management and Protection series, explores a wide breadth of emerging and state-of-the-art ... A lively scene but not so different from the drinking districts of Beijing. Author: John D Liu. Lime or carbonate, is another characteristic component of loess. Our results indicated that water sources of the two plant species varied before and after rainfall. This evening I am taking it easy at the hotel. Since the 1970s, numerous soil- and water-conservation practices have been implemented: terracing, planting of vegetation, natural vegetation rehabilitation, and check-dam construction. [6] Samples of loess unit L1 and paleosol unit S5 were collected from the typical Luochuan section [35 45N, 109 25E], located in the central Chinese Loess Plateau [Kukla and An, 1989; An et al., 1991; Ji et al., 2001; Lu et al., 2004]. The dry Loess Plateau of China’s Shaanxi and Shanxi provinces, also known as the Huangtu Plateau, is a 640,000 km² plateau located around the Wei River valley and the southern half of the Ordos Loop of the Yellow River in central China. It extends into parts of Gansu , Ningxia, and Inner Mongolia. Soil and water conservation on the Loess Plateau in China: review and perspective. The Loess Plateau is one of four famous plateaus in China. The two subsequences before and after the reference point were defined to be x1 and x2. However, there are few reports on the effects of land-use change patterns on SOC and TN stocks and the factors causing changes in SOC, especially for the transition from slope cropland to terrace on the Loess Plateau. Financed by the International Development Association (IDA), the Loess Plateau Watershed Rehabilitation area covers 1,560,000 hectares of the Loess Plateau in 21 counties, 17 of which the government identified as among the poorest in China. 149k. Also referred to as the Huangtu Plateau, the plateau encompasses the following provinces: Gansu, Shanxi, Shaanxi, Ningxia, and the autonomous region of Inner Mongolia.Over 50 million people live on or are dependent on the plateau, which was … Both NPP and water use efficiency of the Loess Plateau increased during 2000-2008. Before you ask how this place became the birthplace of Chinese civilization, you may want to know what happened on this land before humans started settling here. This book comprehensively describes the major ecosystem services in dryland environments that are provided by typical land use, including forestland, grassland and farmland, using the Loess Plateau, Northwest China as an example. Chen L, Wei W, Fu B, Lu Y. Share. However, the correlation between precipitation increase and regional vegetation restoration is still controversial. Altitude only strongly affected SWC after the rainy season. Prog Phys Geog. This is precisely what happened in the Loess Plateau, where vegetation cover was reduced over centuries from grazing animals or agriculture, says Voegele. Therefore, forests mainly exist in some mountainous areas of the plateau. Land cover data for the Loess Plateau before and after the GTGP (derived from maps in years 2000 and 2008, respectively) were extracted from Landsat Enhanced Thematic Mapper. Since the implementation of the Grain for Green Project (GFGP) in the 1990s, the warming and wetting trend in the Loess Plateau is becoming statistically significant in the contex Bibliografie. tion movement of water, i.e. Figure 2(f) shows that the NDVI increased significantly with the turning point in 1999, which aligns well with the GGP implementation. The only thing is, the western world need this destruction before … After 15 yr of deforestation in the Loess Plateau, SOC at 0- and 20-cm soil depth has been reduced by 42 to 86% . To resolve a series of ecological and environmental problems over the Loess Plateau, the “Grain for Green Program” (GFGP) was initiated at the end of 1990s. It was enormously important to Following the conversion of croplands and bare land on hillslopes to forests, the Loess Plateau has displayed a significant greening trend, which has resulted in soil erosion being reduced. Leave a Reply Click here to cancel reply. "I've seen the Sudan, traveled in South and Central America and been all over Europe, but I've never seen what I've been able to see on this tour [of the Loess Plateau, China]. Geographical and geochronological background. * Compaction effects of small-scale farm equipment on loess in doi: 10.1016/j.still.2005.10.001 Liang Y (1997) Main types of soil surface mulches and its effects on water China appear to be of the same order of magnitude as the conservation in Loess Plateau Region. Fortunately for the people on the Loess Plateau, over millennia enough deep reservoirs of soil remained, even after centuries of erosion, and could serve as a basis for restoration. gullied plateau The Loess Plateau isn’t the only place that suffers from deforestation, it happens in many other places. This project shows us that, that human impact on nature also can be positive by restoring it. During 1982– 1999, the LAI displays an obvious increasing trend in the 1980s over the Loess Plateau (Fig. DOI: 10.7717/peerj.8090/supp-5 State Key Laboratory of Soil Erosion and Dry‐land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, 712100 China. Home to more than 50 million people, the Loess Plateau in China’s Northwest takes its name from the dry powdery wind-blown soil. Jiang W, Cheng Y, Yang X, Yang S. Chinese Loess Plateau vegetation since the last glacial maximum and its implications for vegetation restoration. Subsequently, a paleosol, characterized by higher magnetic suscepti- We also examined the tradeoffs between carbon sequestration and water resources with a monthly scale ecosystem model (WASSI-CB). O.4 The Loess plateau, before and after the watershed restoration program Bạn đang xem bản rút gọn của tài liệu. Spatial and Temporal Characteristics of Precipitation and Potential Influencing Factors in the Loess Plateau before and after the Implementation of the Grain for Green Project Author: Wang, Jichao, Sun, Miao, Gao, Xuerui, Zhao, Xining, Zhao, Yong Source: Water 2021 v.13 no.2 ISSN: 2073-4441 Subject: When determining the collapse coefficient of intact loess, the double-line compression test was adopted. Furthermore, the leaf P concentrations of herbaceous plants on the Loess Plateau were significantly lower than that at the global scale (Reich et al., 1999; Elser et al., 2000a), but were also slightly lower than that at the Loess Plateau (Zheng and Shangguan, 2007) scale and at the China national scale (Han et al., 2005). 12 12 11 XX t s nn CAS Article Google Scholar 25. Posted by. Sci. The Loess Plateau, located in the middle reaches of the Yellow River basin, has a long history of intensive agricultural activity. The type and amount of carbonate depends on the process of formation of loess before and after deposition of silt, and the rainfall in the region. The long term strategy for the management of the Yellow River, downstream on the North China Plain, requires a significant reduction in sediment yield from the Loess Plateau (Leung, 1996). The Loess Plateau covers almost all of the provinces of Shaanxi and Shanxi and extends into parts of Henan, Gansu, Ningxia and Inner Mongolia. The question I wish to raise in this paper is whether a reduction in sediment yield from the loess The most prominent change in land surface over the Loess Plateau after 1999 is characterized by active vegetation restoration under the GGP. The area is characterized by arid and semiarid continental monsoon climate. The Loess Plateau, China, has long been suffering from serious soil erosion. It’s the choice we make together. The paper is structured as follows: (1) To collect the precipitation data and analyze the spatial and temporal characteristics of precipitation before and after the GFGP in the Loess Plateau; (2) to analyze the factors and reveal the spatial and temporal characteristics of each factor; (3) to use the statistical methods to quantitatively analyze the main influencing factors of precipitation before and after the … The Loess Hilly and Gully Region (LHGR) represents the core area of the Loess Plateau in China, accounting for 33% of the total area of the Loess Plateau. The objective of this study was to investigate the effect of nitrogen (N) management on soil water recharge, available soil water at sowing (ASWS), soil water depletion, and crop The warming and wetting trend in this area is becoming statistically significant. A vital approach for sustainable development is to achieve continuous synergies of ecosystem services (ESs). Loess Plateau is similar to these topics: Ordos Plateau, Yellow River, Lüliang Mountains and more. Revegetation on the hilly Loess Plateau. GIS-based effect assessment of soil erosion before and after gully land consolidation: A case study of Wangjiagou project region, Loess Plateau By Yansui Liu, Yanjun Guo, Yurui Li and Yuheng Li Cite 2009, 172, 118–126 Microbial activity and community structure in degraded soils on the Loess Plateau of China Ute Hamer1*, Franz Makeschin1, Shaoshan An2, and Fenli Zheng2 1 Institute of Soil Science and Site Ecology, Dresden University of Technology, Pienner Str. The Loess Plateau spans over 640,000 km² in the upper and middle reaches of the Yellow River. This book studies loess landform inheritance based on national basic geographic data and GIS spatial analysis method. Asia: Effects of human activity on the soil. …“black-land” (heitu) soils of the Loess Plateau in China consist of a fertile layer 1 to 3 feet (30 to 90 cm) thick of organic material accumulated by local farmers. Loess Plateau is not just a problem for local land management. It is famous for its deep loess layer, whose thickness often ranges from 30 to 200 m, even reaching 300 m in some places (Fu et al., 2017). 8 years after beginning of restoring the ecological systems. changed between the vegetated land surface and the plan- etary boundary layer (Myneni et al., 2002). 132k. The precipitation of the Loess Plateau is concentrated in months of July, August, and September, with an annual average between 200 to 600 mm. in slider. In most areas, the thickness of the loess profile is deeper than 100 m, and two-thirds of the area is arid and semiarid. ( 2011 ) with a mean of 1.96 Gt per year. Atmospheric precipitation is the main source of replenishment for the loess phreatic water in the basin. This erosion creates problems that have occurred from ancient times to the present. The Loess Plateau, one of the crucial areas of GFGP, has a barren ecosystem. In China, soil from the Loess Plateau erodes into the Yellow River. Around 3,000 years ago, farmers settled on the fertile Loess Plateau in western China, a region about the size of France. By the 7th century, the rich soils were feeding about one quarter of the Chinese population. The Loess Plateau of China is known for its severe land degradation, soil erosion and water scarcity problems (Shi and Shao, 2000; Chen et al., 2007; Liang et al., 2015; Fu et al., 2017). FairyLight. University of Chinese Academy of Sciences, Beijing, 100049 China. Topic. Loess Plateau, Chinese (Pinyin) Huangtu Gaoyuan or (Wade-Giles romanization) Huang-t’u Kao-yüan, highland area in north-central China, covering much of Shanxi, northern Henan, Shaanxi, and eastern Gansu provinces and the middle part of the Huang He (Yellow River) basin. Due to the special geographic landscape, soil and climatic conditions, and long history (over 5000 years) of human activity, there has been intensive soil erosion which has resulted in prolonged and great impacts on social and economic development in the region. Sources can be local or distant, resulting in local variations in loess. (2) The rainfall in these three months occupy 60-70% of the year total, usually in the form of high intensity storms. The Chinese Loess Plateau is one of the most rapidly eroding regions in the world. Looking at what Loess Plateau was like before, which took 100’s of years to destroy, and you have turned it around in just 10 years. The Loess Plateau spans over 640,000 km² in the upper and middle reaches of the Yellow River. 2003). Using a multi-channel automated CO2 efflux chamber system, we measured SCE in situ continuously before and after the conventional tillage in a rain fed wheat field of Loess Plateau, China. Unfortunately, during the last four decades, too … Calibration of the LISEM model for the Danangou catchment showed that LISEM can in principle be applied to the Chinese Loess Plateau. In this book we collected a series of papers on erosion, not focusing on agronomic implications, but on a variety of other relevant aspects of the erosion phenomena. Before (A) and after (B) revegetation on the hilly Loess Plateau. Severe soil and water loss led to widespread land degradation. Geogr. Therefore, Home to more than 50 million people, the Loess Plateau in China's Northwest takes its name from the dry powdery wind-blown soil. We analyzed the relation between annual sediment discharge (from 1919 to 2010) from the Loess Plateau and the relative sunspot number, using Complex Morlet wavelets. Compared with CT treatment, NT significantly (P < 0.05) reduced soil bulk density (7.1%) in the 20-30 cm soil layer, and increased macroporosity (>60 µm, 17.0%) and saturated After reversing course back towards the east, it begins the massive Ordos Loop by turning northwards at Zhongning County in Ningxia. The Loess Plateau, known as the Huangtu Plateau in Chinese, is about 640,000 square kilometers, accounting for 6.67 percent of China's total land area. ... (Q after − Q before)/Q before). Section of farmland on the edge of the Loess Plateau. the soil in the study area is mainly derived from loess, which is fine silt to silt in texture and weakly resistant to erosion. However, the phreatic aquifers in the loess plateau are mainly distributed in the 19 loess plateau areas south of Qingcheng (Fig. 1. The productivity effect has been investigated by Chen et al. 118 DOI: 10.1002/jpln.200700340 J. The Capitol police removes disabled people as they protest healthcare changes, in 2017. see full image. The LP is famous for its deep loess. The Loess Plateau, located in parts of modern-day Qinghai, Henan, Shanxi, Shaanxi, and Gansu Provinces as well as the Ningxia Autonomous Region (home to the ethnic Hui minority) and the Inner Mongolia Autonomous Region, is located at the headwaters of the Yellow River and has long been known as “the cradle of Chinese civilization”. Soil Sci. One of the most interesting restoration project that I came across as an undergraduate student is the Loess Plateau Rehabilitation Project. December 2014 800 × 700 Loess Plateau before and after Again, the Loess Plateau. run-on, as the spatial scale increases. Disks were weighed before and after mounting the disks in order to get the weights of sediment and to weight normalize luminescence signals, using a high-precision (with readability of 0.01 mg) analytical electronic balance. Approximately 100 m of thick loose porous loess covers the Chinese Loess Plateau and functions as a soil reservoir, which can effectively alleviate drought … This book presents state-of-the-art scientific evidence and technological innovations to restore lands on the Loess Plateau of China, known worldwide for its serious land degradation and desertification problems. The Loess Plateau is a plateau or high plain that covers more than 250,000 sq mi in the middle and upper reaches of the Yellow River in China. Ten percent of the earth's land surface area is covered with loess deposits, a type of highly erodible soil consisting of less than 20% clay. Challenge. In Gansu the . The XSD loess–palaeosol at the southern edge of the Jinghe River is located in Guanzhong Basin [108°29′40″E, 34°26′37″N] (), 26.2 km N from Xi'an.The study area features a warm temperate continental monsoon climate and four distinct seasons with both rain and high temperatures during the same period. The Loess Plateau is a continental plateau in the upper and middle reaches of the Yellow River in China. A brilliant JOB…. It's a truly breathtaking transformation from tan sandy slopes to lush green terraced hills, which now produce very high yields of a wide variety of food crops. With the Grain-for-Green project, the vegetation of the plateau has recovered gradually. The loess plateau comprises a mix of arid, semi-arid and semi-humid areas, and most of the plateau is in a semi … In the water-limited, heavily eroded environment of the Loess Plateau, these systems might be expected to improve crop yields and reduce erosion, enhancing productivity, sustainability, or both. 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Chen L, Wei W, Fu B, Lu Y hydrogeological conditions that I came across as undergraduate! Many important functions this region is commonly known to be x1 and x2 the manifestations! Value than than natures basic resources image of the LISEM model for the Loess.... Book studies Loess landform inheritance based on national basic geographic data and GIS spatial analysis method is not just but.