北大藏秦水陆里程简“阳”县考辨

北京大学入藏的秦代水陆里程简册中记载秦代有"阳"县存在,关于这一新出现的秦县,前辈学者认为可能是位于今河南省方城县的秦汉"阳城"。然而,从简册中记载的"阳"县下属各乡到其他地区的距离来看,"阳县"不太可能在今方城附近,而更有可能是位于先秦"唐"国故地的"唐"县。其他出土材料所见的"唐"县一般写作"阳",清华简《系年》中还有楚国曾灭"唐(阳)"置县的明确记载。秦代的阳县应该就是继承了楚灭唐国之后所设的阳县。     

Users' perspectives on decentralized rural water services in Tanzania

This article examines the impact of decentralization reforms on improving access to domestic water supply in the rural districts of Kondoa and Kongwa, Tanzania, using a users' and a gender perspective. The article addresses the question whether and to what extent the delivery of gender-sensitive water services to rural households improved after the reforms. Household- and village-level data were obtained through a household survey and qualitative methods. The findings show an increase of the proportion of households using improved sources of domestic water between 2002 and 2011. However, more than half of users still travel over a kilometre and use more than an hour to collect water in the dry season. Despite the increased proportion of women in water management committees, the outcomes of these decentralized arrangements differ for men and women. Overall, the reforms have produced contradictory effects by improving access to water supply for some users, and creating or reinforcing existing inter- and intra-village inequalities.     

Hydraulic and hydrochemical properties of deep sedimentary reservoirs of the Upper Rhine Graben,Europe

Hydraulic and hydrochemical data from several hundred wells mostly drilled by the oil and gas industry within the four deep carbonate and siliciclastic reservoirs of the Upper Rhine Graben area in France and Germany have been compiled, examined, validated and analysed with the aim to characterize fluids and reservoir properties. Due to enhanced temperatures in the subsurface of the Upper Rhine Graben, this study on hydraulic and hydrochemical properties has been motivated by an increasing interest in deep hydrogeothermal energy projects in the Rhine rift valley. The four examined geothermal reservoir formations are characterized by high hydraulic conductivity reflecting the active tectonic setting of the rift valley and its fractured and karstified reservoirs. The hydraulic conductivity decreases only marginally with depth in each of the reservoirs, because the Upper Rhine Graben is a young tectonically active structure. The generally high hydraulic conductivity of the reservoir rocks permits cross‐formation advective flow of thermal water. Water composition data reflect the origin and hydrochemical evolution of deep water. Shallow water to 500 m depth is, in general, weakly mineralized. The chemical signature of the water is controlled by fluid–rock geochemical interactions. With increasing depth, the total of dissolved solids (TDS) increases. In all reservoirs, the fluids evolve to a NaCl‐dominated brine. The high salinity of the reservoirs is partly derived from dissolution of halite in evaporitic Triassic and Cenozoic formations, and partly from the fluids residing in the crystalline basement. Water of all four reservoirs is saturated with respect to calcite and other minerals including quartz and barite.     

Fluid mixing induced by hydrothermal activity in the ordovician carbonates in Tarim Basin,China

Permian hydrothermal activity in the Tarim Basin may have been responsible for the invasion of hot brines into Ordovician carbonate reservoirs. Studies have been undertaken to explain the origin and geochemical characteristics of the diagenetic fluid present during this hydrothermal event although there is no consensus on it. We present a genetic model resulting from the study of δ¹³C, δ¹⁸O, δ³⁴S, and ⁸⁷Sr/⁸⁶Sr isotope values and fluid inclusions (FIs) from fracture‐ and vug‐filling calcite, saddle dolomite, fluorite, barite, quartz, and anhydrite from Ordovician outcrops in northwest (NW) Tarim Basin and subsurface cores in Central Tarim Basin. The presence of hydrothermal fluid was confirmed by minerals with fluid inclusion homogenization temperatures being >10°C higher than the paleo‐formation burial temperatures both in the NW Tarim and in the Central Tarim areas. The mixing of hot (>200°C), high‐salinity (>24 wt% NaCl), ⁸⁷Sr‐rich (up to 0.7104) hydrothermal fluid with cool (60–100°C), low‐salinity (0 to 3.5 wt% NaCl), also ⁸⁷Sr‐rich (up to 0.7010) meteoric water in the Ordovician unit was supported by the salinity of fluid inclusions, and δ¹³C, δ¹⁸O, and ⁸⁷Sr/⁸⁶Sr isotopic values of the diagenetic minerals. Up‐migrated hydrothermal fluids from the deeper Cambrian strata may have contributed to the hot brine with high sulfate concentrations which promoted thermochemical sulfate reduction (TSR) in the Ordovician, resulting in the formation of ¹²C‐rich (δ¹³C as low as ?13.8‰) calcite and ³⁴S‐rich (δ³⁴S values from 21.4‰ to 29.7‰) H₂S, pyrite, and elemental sulfur. Hydrothermal fluid mixing with fresh water in Ordovician strata in Tarim Basin was facilitated by deep‐seated faults and up‐reaching faults due to the pervasive Permian magmatic activity. Collectively, fluid mixing, hydrothermal dolomitization, TSR, and faulting may have locally dissolved the host carbonates and increased the reservoir porosity and permeability, which has significant implications for hydrocarbon exploration.     

明代年例银制度形成探论

明代年例银制度是经过长期演变逐渐形成的一项军事供给制度。宣德十年(1435)首先出现京运银,历经景泰、天顺时期,京运银两中有一笔银两开始向"岁例"发生制度性转变的趋势;成化、弘治之际,"常数"、"岁运"、"岁例"、"年例"、"年例银"等名称的出现是这笔京运银两制度化发展的结果,标志着明代年例银制度的初步形成;嘉靖十六年(1537)年例银一年一发的规定以及年例银会计预算制的出现,意味着明代年例银制度的完全确立。年例银制度的形成和确立,改变了明代国家的军事供给体制,是明代军事财政史上的一个重大变革。     

明初大运河南旺分水枢纽水工技术考

明朝初年,国脉皆仰东南,为解决南方粮财物的北运问题,宋礼和白英受命组织修建了大运河山东段南旺分水枢纽。该枢纽主要包括引汶济运、导泉补源、设立水柜和置闸节流四个组成部分。其中,引汶济运是工程之重点,包括戴村坝、小汶河、南旺分水以及配套工程等四个子系统。这些水利设施组成一个和谐的系统工程,保证了该段运河的水量稳定充足,从而实现了大运河500余年的正常通行。南旺分水枢纽代表了我国古代运河水工的最高科学技术成就,堪称世界水利史上的一大经典范例。     

Climate change,conflict, and cooperation: Global analysis of the effectiveness of international river treaties in addressing water variability

Climate-driven water variability is a natural phenomenon that is observed across river basins, but one that is predicted to increase due to climate change. Environmental change of this kind may aggravate political tensions, especially in regions which are not equipped with an appropriate institutional apparatus. Increased variability is also likely to challenge regions with existing institutional capacity. We argue that our best attempts to assess the ability of states to deal with variability in the future rest with considering how agreements have fared in the past. In this paper, we explore treaty effectiveness, or treaty resilience, by investigating whether particular water allocation and institutional mechanisms help mitigate inter-country tensions over shared water. We use water-related events from the Basins at Risk events database as a dependent variable to test particular hypotheses regarding the impact of treaty design on conflict and cooperation over time. A broad set of climatic, geographic, political, and economic variables are used as controls. The analysis is conducted for the years 1948–2001 using the country dyad as the level of observation. Findings pertaining to our primary explanatory variables suggest that country dyads governed by treaties with water allocation mechanisms exhibiting both flexibility and specificity evince more cooperative behavior. Country dyads governed by treaties with a larger sum of institutional mechanisms likewise evince a higher level of cooperation, although certain institutional mechanisms appear to be more important than others.     

Giving women a voice on decision-making about water: barriers and opportunities in Laikipia,Kenya

In more than 75% of households around the world in which water needs are fulfilled by retrieving water, women are typically tasked with this critical responsibility. This is true in Kenya, and the challenges women in rural areas of the country face are compounded by a lack of reasonable access to safe water by 56.5% of rural households. More than 25% of the population must travel at least 30?minutes to collect water, and 70% of all diseases in the country are water-borne (Kameri-Mbote and Kariuki 2015). Given their role as the primary household decision-maker about water, women have an astute understanding of water availability, access, quality and household use, and women’s perspectives would enhance decision-making in groups that address water resource management. However, women have historically been marginalized from participation in such processes for numerous reasons related to lack of empowerment, leadership, and voice, and the practicalities of the demands on her time that prevent her from having discretionary time to devote to civic processes. In this study, we interviewed 153 women living in three different watersheds in the Laikipia region of central Kenya about their views on water resource management, and interest in participation in water resource user associations (WRUAs) as members and leaders. Our results are consistent with prior research in that marginalization of women from WRUA participation is steeped in entrenched normative beliefs and behaviors about women’s roles and her domestic responsibilities, a lack of money to participate, and a lack of time given her other responsibilities.     

Has the euro sustainably increased home price co‐movement?

A low level of co‐movement between different euro country housing markets creates difficulties for the ECB in setting monetary policy. Such co‐movement across eurozone countries has been the subject of a number of studies, using different methodologies and finding mixed results. In this study, we use endogenous break methods to explicitly test for whether the introduction of the euro has changed home value co‐movement. We also employ informal correlation analysis. Endogenous break results indicate no sustainable increase in co‐movement attributable to the euro, whereas correlation analysis is suggestive of a decrease in synchronization since the currency's introduction.     

水东宋氏职衔考

水东宋氏从唐初至明末统治贵州水东地区,唐宋元明四朝先后封赐诸多官衔。通过对水宋氏所任职衔的研究,可充分认识其兴起、发展、兴盛和衰亡过程,也可窥见中央王朝的治黔方略及贵阳政区的形成过程。