Results 11 to 20 of about 6,927 (157)
Unpacking value destruction at the intersection between public and private value
Public Administration, Volume 101, Issue 4, Page 1207-1226, December 2023., 2023 Abstract Public services do not always create value. Rather, when poorly organized and/or delivered, they can destroy value and make service users' lives worse. However, such “value destruction” is presently weakly conceptualized in public management theory. Consequently, this paper is devoted to the empirical examination of value destruction and hence
Tie Cui, Stephen P. Osborne
wiley +1 more source
Policy Studies Journal, Volume 51, Issue 4, Page 817-842, November 2023., 2023 Abstract Are narratives as influential in gaining the attention of policymakers as expert information, including for complex, technical policy domains such as artificial intelligence (AI) policy? This pre‐registered study uses a field experiment to evaluate legislator responsiveness to policy entrepreneur outreach.
Daniel S. Schiff, Kaylyn Jackson Schiff
wiley +1 more source
Shuitu Baochi Xuebao, 2004 华北平原农业面临的主要问题是水资源短缺,地下水位持续下降。通过一维土壤水量平衡模型模拟了华北平原不同灌溉方式下农田耗水量和土壤水分深层渗漏的变化,并分析了作物的产量和水分利用效率。结果显示在正常的灌溉条件下,冬小麦季地下水的采补差额超过了200mm,某生育期一定程度的水分亏缺(返青期、拔节期或灌浆期)能明显减少冬小麦的耗水量,但没有明显减少作物的产量。因此,在一定程度上减少灌溉是可行的,但仍不能达到地下水资源的采补平衡。从长远来看,华北平原维持可持续的地下水灌溉开采,应减少冬小麦的种植面积 ...
姜杰 张永强
doaj +2 more sources
Mining-affected water resources and ecological effects in ecologically fragile mining areas of western China [PDF]
The ecologically fragile mining area in the west is an important coal production base in China, and the current scale and intensity of coal mining has far exceeded its environmental carrying capacity, which is very likely to cause irreversible damage to ...
Liqiang YU +4 more
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Soil and Water Conservation and Ecological Benefits of Forest Ecosystem in New Urban Karst Areas of Central Guizhou Province [PDF]
, 2022 [Objective] Soil and water conservation and ecological benefits of forest ecosystem in the new urban karst areas of Guanshanhu District, Guiyang City in Central Guizhou Province were studied to scientifically evaluate the achievements of ecological ...
Dai Zhengjiao +6 more
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Effects of Different Micro Rainwater Harvesting Measures on Safflower Growth [PDF]
, 2023 [Objective] The cultivation of safflower with micro rainwater harvesting technology on the hillslopes of the temperate desert grassland in Yili Valley was evaluated in order to provide technical support for dryland cultivation of safflower and for ...
Hu Guiqing +3 more
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Shuitu Baochi Xuebao, 2001 根据灌区盐量平衡原理 ,采用实际监测资料 ,对渭干河及其所属的库车、沙雅、新和县平原绿洲灌区进行盐均衡分析 ,深入探讨了临界灌排比的影响因素及其确定方法。研究结果表明 :(1)灌排比的概念简捷明了 ,体现了干旱区水利建设、灌溉农业的特点 ,可作为衡量干旱区绿洲灌区水盐运动状况的一个指标 ,同时亦是进行灌排管理、规划设计的科学依据。 (2 )临界灌排比与灌溉引水量、排水量、河水含盐浓度、排水含盐浓度等因素有关。渭干河、库车、沙雅、新和灌区临界灌排比分别为 10 .80 ,6 .5 5 ,2 0 .0 9 ...
HU +9 more
doaj +2 more sources
Risk Assessment and Zoning on Supply and Demand of Water Yield Services in Pakistan Section of China-Pakistan Economic Corridor [PDF]
, 2023 [Objective] The supply and demand of water yield services in the Pakistan section of China-Pakistan economic corridor were analyzed, the risk areas for water yield services were identified scientifically, and the risk prevention measures were formulated ...
Cheng Zhenni +4 more
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Integrative Conservation, EarlyView.Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee +5 more
wiley +1 more source
, 2009 生物地理学研究是生物学和地理学交叉非常明显的部门自然地理学学科,它具有很强的基础研究特点,同时研究成果也具有很大的应用潜力。近年来,我国生物地理学基础研究在国家自然科学基金委等部门的支持下,在山地植被与地理环境、干旱半干旱区植被与地理环境、植物区系、植物物候、土壤动物与土壤生态功能、土壤生物结皮等方面开展了全面而深入的研究。同时拓展了传统生物地理学的研究方向,在植物地理学与全球变化、植物地理学与生物多样性保护、植物地理学与生态系统管理等方面也开展了大量研究。尤为可贵的是干旱半干旱区土壤生物结皮研究 ...
冷疏影 +8 more
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