Xiuqiang Liu- Ph.D
- PhD Student at Tianjin University
Xiuqiang Liu
- Ph.D
- PhD Student at Tianjin University
The Renaissance, The Enlightenment, and the Harmony of Confucianism, Buddhism, and Taoism.
About
11
Publications
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Introduction
Xiuqiang Liu currently works at School of Earth System Science, Tianjin University. Xiuqiang does research in Ecohydrology. Their current project is 'Evolution mechanism and ecohydrological effects of epikarst zone in karst region of China'.
Current institution
Additional affiliations
September 2018 - present
Education
September 2014 - July 2018
Publications
Publications (11)
Global warming has led to accelerated transitions between dry and wet periods, causing plants to experience more water stress and water use strategy alterations. This could have a significant impact on plants in karst regions due to the substantial spatial and temporal variability of soil and rock moisture. In this study, we monitored and compared...
Study region: Guizhou Province, Southwest China.
Study focus: This study aims to estimate the hydraulic conductivity (Kh) of the weathered rock fractures (epikarst) based on the best fitting of observed water head in 105 slug tests in the study sites. Specifically, comparisons of the estimated results from the analytical and numerical methods revea...
To study the spatiotemporal patterns of carbonate erosion rates and their relationships with climate, lithology, vegetation and soil environmental conditions, a meta-analysis was carried out on the basis of the data systematically collected in field in China and neighboring countries. The results reveal that carbonate erosion rates correlated posit...
In arid area, the liquid water and water vapor states in soil profiles and fluxes at the upper and bottom interfaces are extremely complex due to heterogeneity of soil textures and the driving forces of heat and matrix potential. In this study, we used Hydrus‐1D to simultaneously simulate liquid water, water vapor, and heat transport based on the o...
In recent decades, the hydrological cycle, ecology and environment of the inland river basins in northwest China have been significantly changed due to climate change and implementations of the ecological protection and water division projects. It is necessary to investigate how climate change affects vegetation restoration and runoff generation, a...
In arid area, the liquid water and water vapor states in soil profiles and fluxes at the upper and bottom interfaces are extremely complex due to heterogeneity of soil textures and the driving forces of heat and matrix potential. In this study, we used Hydrus-1D to simultaneously simulate liquid water, water vapor, and heat transports based on the...
内陆干旱区植物耗水量是生态恢复和水资源管理的重要依据。参照甘肃省民勤县青土湖附近气象条件、干旱区典型植物生理特征以及土壤水力特征参数，采用Tardieu-Davies模型（气孔导度模型），计算在适宜和极限生态地下水埋深下7种典型植物生长季蒸腾耗水量，并与国内外研究成果对比，得出以下结论：适宜、极限生态地下水埋深下，7种植物生长季内平均蒸腾量分别为793、602 mm。不同植物蒸腾量差异大，适宜生态地下水位埋深下水生植物芦苇（Phragmites australis）、河岸带植被柽柳（Tamarix chinensis）蒸腾量最大，分别为1292、1147 mm；耐旱性强的荒漠植被梭梭（Haloxylon ammodendron）蒸腾量最小，为279 mm；其它植被盐节木（Halocnemum...
Terminal lake is very important to maintain the stability of its surrounding ecological environment． In this paper，we collected five kinds of water ( precipitation，surface water，groundwater，soil water and vegetation water) samples from oasis and desert around Qingtu lake in the lower reaches of Shiyang Ｒiver Basin，analyzed the variation characteris...
Ecological depth to groundwater table is of great importance in restoration and water resources management in the arid area of Northwest China. Here we conducted a meta-analysis based on the literature dataset. The dataset includes thirteen kinds of plant and three types of vegetations (arbor, shrub, herbal). We identified the relationship between...
选取石羊河流域下游青土湖芦苇区与荒漠植被过渡区为研究区，采集24 个样点不同深度土样和地下水水样，测定土壤含盐量和质地、地下水埋深和矿化度等环境要素，分析芦苇区与荒漠植被过渡区土壤剖面含盐量分布特征及其主要影响因素和定量表述式。结果表明：（1）土壤剖面盐分聚集在芦苇区主要为平均型，荒漠过渡区主要为表聚型（0~20 cm）和中聚型（20~60 cm）；（2）土壤盐分（S）随地下水矿化度（m）与埋深（h）之间的比值呈指数型关系式（S = aebm/h）；（3）随着m/h 值的增大，芦苇区盐分聚型从平均型到中聚型，荒漠过渡区从平均型到中聚型再到表聚型的方式过渡；（4）维持芦苇和荒漠典型植被（如白刺）生长的土壤表层含盐量分别不超过2 g·kg-1、6g·kg-1 时，地下水临界埋深为1.15 m 和...
Questions
Questions (15)
The mobile water is soil water sampled with suction lysimeters, and bulk water is soil less-mobile water sampled with cryogenic extraction. Is the soil water extracted by the suction lysimeters (-75kpa) mobile water?
Can anyone tell me what is science? This can be a professional explanation or in your own words.
I drilled a lot of holes in the limestone in the karst area, took out the rock cores , did the falling head test in the holes, measured the width of the fractures, and wanted to calculate the permeability coefficient of the rock fractures, but I didn't find a suitable formula, or can it be calculated with an inversion method? Is there any article on this, I would like to learn.
To analyze the effect of water-vapor-heat on soil water movement and storage, the differences of infiltration, evapotranspiration, and soil water storage under different water-vapor-heat combination conditions were compared in Hydrus 1D. The infiltration under the coupling of water-vapor-heat was 91.3mm and 123.8mm, which was larger than the precipitation (the infiltration under the no coupling of water-vapor-heat was equal to the precipitation, 79.9mm and 119.4mm), indicating that the infiltration of 11.4mm and 4.4mm were condensation water, accounting for 14.3% and 3.7% of the precipitation. So I don't understand how to calculate the infiltration. Is it atmospheric water vapor condensation or soil water vapor condensation? Why is infiltration greater than rainfall?
Samples of Nitraria tangutorum, groundwater and soil water were collected in the arid area of Northwest China. Generally, there is no hydrogen and oxygen isotope fractionation when roots absorb water. However, this study found that the isotope fractionation occurs when roots absorb water, and the hydrogen isotope fractionation is more obvious. The vegetation in arid area will redistribute water from the moist soil layer to the roots in the arid soil layer to alleviate the root drought stress caused by too low soil water. The Nitraria tangutorum in this study area absorbed more water molecules containing 1H from groundwater and released them into soil through hydraulic redistribution, resulting in much more negative hydrogen isotope of soil water. Why did Nitraria occur such obvious isotope fractionation? Is the negative isotope of soil water caused by hydraulic redistribution? What does this have to do with the ‘two water worlds’ hypotheses?
In the process of soil evaporation, hydrogen and oxygen isotopes will change. How to use oxygen isotope to quantify soil water evaporation or groundwater evaporation ?
The earth is an open system, and the evolution of the earth's interior is more and more complex. The earth releases energy and material outward and also accepts the energy and material from the outside. According to the law of thermodynamics, is the entropy increase or decrease of the earth system? What is the impact of human society on this process? Is entropy increasing or entropy decreasing in human society?
In many countries, air and rail transportation is interrupted. The isolation measures lead to the decrease of road traffic utilization and the production of factories. The result is reduced carbon emissions and clean air above China, South Korea, European countries and the United States. China's anti epidemic measures have reduced carbon emissions by 25% in just one month. At the end of March, the European Space Agency (ESA) released satellite images showing changes in the ozone layer over many countries between January 1 and March 11. The changes above Italy are particularly dramatic, with the country's ecological indicators improving, as seen by the naked eye: swans and fish begin to return to the Venetian canal, and then dolphins and jellyfish are observed.
Due to the impact of COVID-19 , people's lifestyle has changed, human activities such as transportation, catering, tourism, industry, manufacturing, agriculture and so on have been limited, the impact of human beings on ecology has weakened, and the COVID-19 may continue to exist. What will be the impact of COVID-19 on global climate change and ecology?
Strong evaporation of soil water in arid areas, so how to compute the evaporation of soil water according to the hydrogen and oxygen isotopes?
TDR method monitors soil moisture by measuring the transmission time of electromagnetic pulse in soil medium. When measuring soils with high organic carbon content and especially high or low density, the energy dissipation of the input electromagnetic wave is large, which results in the ambiguity of the reflected information and the distortion of the data. In the process of measuring high salinity soil, salt attenuates the reflected pulse signal, affects the pulse reflection time, and affects the monitoring of soil moisture content.
Rehabilitation of desert vegetation is conducive to reducing soil evapotranspiration, but some trees or water-consuming vegetation will reduce groundwater level. Will groundwater level be restored in the long run?
capillary fringe effects extinction depth
How the soil thermal gradient affects the water movement in GSPAC(groundwater-soil-plant-atmosphere continuum) System?
How Groundwater Burial Depth and Clay Affects Soil Salinization in arid and semi-arid lands
