Results 31 to 40 of about 2,449 (147)
Shuitu Baochi Xuebao, 2018 为了研究荒漠草原不同土壤类型对降水的响应过程，在宁夏盐池县皖记沟村选取分布较广的灰钙土、风沙土和基岩风化残积土为研究对象，采用双环法测定其入渗过程，分析并比较三者的入渗特征，利用模型拟合土壤入渗过程。结果表明：研究区内3种类型土壤入渗过程大致可分为3个阶段，0~5 min入渗速率急剧下降阶段，5~10 min入渗速率逐渐变缓并趋于稳定及30 min后入渗速率达到相对稳定的状态。通过对不同土壤初始入渗速率、稳定入渗速率及60 min累积入渗量对比分析，发现不同土壤类型的入渗特征存在差异 ...
陈娟 +5 more
doaj
Responses of Loess Ground with Different Slopes and Vegetation Covers to Rainfall Infiltration [PDF]
[Objective] To investigate the soil moisture response to rainfall in loess ground with different slopes and vegetation types. [Methods] Eight in-situ observation plots were established, including flat surfaces with bare soil, Artemisia cover, and Robinia
HU Xiangyang +6 more
core +1 more source
Shuitu Baochi Xuebao, 2020 为探明影响有压入渗渠道渗漏的主要因素，采用恒水位静水试验的方法开展渠道渗漏试验，试验设置8个入渗水头，探究不同水深情况下渠道的累积入渗量及入渗速率的变化规律，并选用HYDRUS-2D软件进行模拟分析。结果表明：实测值与模拟值的变化规律基本吻合，入渗速率的RMSE值为0.003 6~0.376 3 cm/h，累积入渗量的RMSE值为0.001 7~0.300 9 m3，R2的值均达到0.9以上，说明选定的土壤水分运动方程合理，选取的相关参数值合适，用于渠道渗漏评价是可行的。采用HYDRUS ...
张健, 魏占民, 张金丁, 苏日娜
doaj
Exploration on the surface water leakage mechanism of travertine pools in Salix cupularis shrub area of Huanglong Scenic Spot, Sichuan Province [PDF]
Recently, some travertine landscape groups in Huanglong Scenic Spot have been degraded to varying degrees. Surface water leakage, blackening and desertification have occurred on a large scale in the dense distribution area of Salix cupularis shrub, which
Dong SUN +8 more
core +1 more source
Shuitu Baochi Xuebao, 2017 以宁夏中部旱区砂田土壤为研究对象，通过对不同砾石覆盖厚度条件下砂田土壤水分入渗过程进行研究，采用一维垂直定水头入渗法，选取砾石覆盖厚度为影响因子，设置5个覆盖厚度（0，6，9，12，15 cm），观测湿润锋运移和入渗量变化规律，比较各处理土壤入渗特征，利用模型拟合土壤入渗过程。结果表明，砾石覆盖提高了土壤水分入渗能力，土壤湿润锋运移距离和入渗量明显增加。与CK相比，砾石覆盖厚度为6，9，12，15 cm时的累积入渗量分别增加了4.3%，11.8%，12.8%和17.1%，平均入渗率增加了25.8%，38.
白一茹, 赵云鹏, 王幼奇, 张
doaj
Patterns of Resource Recycle Utilizing Sewage-soil-plant Systems: Ecological Engineering FLTS for Domestic Sewage [PDF]
, 2004 本文以厦门市狐尾山和仙岳山的原生生活污水林地生态处理系统（FLTS）为例，提出了“氧化塘+污水动力输送、管网投配+林地+再生水回收”的污水－土壤－植物资源再生范式，通过对该系统关键生态过程的研究，解决了FLTS生态工程运行技术参数。FLTS实验林地分为马尾松次生林和人工速生巨尾桉林，林地土壤属南亚热带丘陵台地典型的赤红壤性砂土，机械组成空间差异明显。不同林型比较，短期轮伐集约栽培（SRIC）下巨尾桉速生林平均年生物量积累明显优于次生马尾松林。N、P、K元素年累积量分别较马尾松林高出1.66～3.50倍 ...
胡宏友
core
Research Progress of Nuclide Migration in Geological Disposal of High-level Radioactive Wastes [PDF]
With the rapid development of nuclear energy, the nuclear technology has been widely used in various fields, such as industry, agriculture and medicine.
TANG Zhenping1, 2, DU Cong1, LI Nan2, 3, BI Wenting1, WU Peng1, SUN Haoran1, WANG Jiawei1, DOU Jiale1, DUAN Xianzhe1, 2
core +1 more source
, 2021 [目的]阐明施用保水剂与木质素结皮结合的恢复措施对沙地植被的调控机制,为荒漠草原沙地植被恢复提供理论依据。[方法]在内蒙古自治区乌拉特荒漠草原设置试验样地。试验处理包括对照和恢复措施(保水剂与木质素结皮结合)两个处理。测定了植物地上生物量、盖度、土壤含水量、土壤团聚体比例、土壤入渗速率、稳渗速率、碱解氮、速效磷和速效钾的含量。[结果](1)恢复措施显著提高了植物地上生物量和盖度;(2)恢复措施提高了水稳性大团聚体比例、入渗速率和稳渗速率,降低了微团聚体的比例,从而显著提高了土壤含水量;(3 ...
吴红慧 +6 more
core +1 more source
Review of techniques and case studies for saline-alkali land amelioration in the coastal regions of China [PDF]
Soil salinization is one of the major challenges in agricultural production and ecological development. With the rapid development of China’s coastal areas, land resources are becoming increasingly scarce, creating an urgent need for the improvement and ...
Hang LYU +5 more
core +1 more source
保护性耕作对豫西黄土坡耕地降水产流、土壤水分入渗及分配的影响
Shuitu Baochi Xuebao, 2008 利用长期定位试验(1999~2007年),在豫西旱区坡度为8°的黄土坡耕地上,研究了免耕覆盖、深松覆盖和传统耕作不同耕作措施对降水产流、土壤水分入渗及分配的影响。结果表明:(1)免耕覆盖和深松覆盖延迟产流时间,缩短降水结束后径流持续时间,径流系数较传统耕作分别减少了97.49%和81.20%,径流量和土壤侵蚀量减少80%以上。免耕覆盖水土保持效果最好,在降雨强度为123 mm/h、历时40 min产生微弱水土流失。(2)传统耕作的土壤水分入渗速率初始最大,随后急剧下降,至4 min降至最低。在3~60 ...
王育红 +6 more
doaj