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The ERiK-Methodological Report III is the third in a series of methodological reports related to the 'Entwicklung von Rahmenbedingungen in der Kindertagesbetreuung -indikatorengestützte Qualitätsbeobachtung (ERiK)' study. The report focuses on the conception, sample selection, and survey designs of the ERiK-Surveys 2022. Together with the ERiK-Methodological Report I and II, that cover the ERiK Surveys 2020, it provides comprehensive background information on the ERiK-Surveys conducted in 2022 and describes their progression until December 31, 2021. The subsequent steps, such as implementing the ERiK-Surveys 2022, will be described in a later report.

Antiques & Collectibles --- Collectibles --- early childhood education; education; educational research; educational study; empirical survey; field study; quality development; sampling design; survey methodology; technical report; target population; sampling frame; contacting; survey design; survey instruments

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Ecological protection and high-quality development in the basin of the Yellow River, known as China’s “Mother River” and “the cradle of Chinese civilization”, have been receiving increasing attention because of the important role they play in China’s economic and social development, and its cultural heritage. Under ongoing climate change and intense human activities, the Yellow River basin is facing crucial challenges, e.g., flooding, water security, water resource shortage, water pollution, and ecological environment degradation, which seriously affects the sustainable development of the regional economy and society. Meanwhile, significant differences in key characteristics across the upper, middle, and lower reaches call for joint management efforts, including integrated management, water conservancy, and ecological environment restoration. This Special Issue focusses on the current state, challenges, and suggestions relating to Yellow River basin management and sustainable development under pressure, aiming to help improve ecological protection and achieve high-quality development. The following topics, including the management, restoration and protection of the Yellow River basin, and harmonious regulation of the human–water relationship were systematically studied.

Business strategy --- Management of specific areas --- Gini coefficient --- fairness principle --- double-level --- water-saving potential --- Weihe River basin --- Budyko framework --- runoff changes --- climate change --- underlying surface parameters --- human activities --- Yellow River --- cultivated land --- Object-Oriented Feature Extraction --- wheat --- corn --- water use level --- SBM-DEA model --- window-DEA model --- economic and social development --- matching degree --- yellow river basin --- water–energy–food --- harmony equilibrium --- harmonious regulation --- the Yellow River --- bank collapse --- sediment transportation --- numerical simulation --- curved channel --- cohesive --- cross-sectional shape --- asymmetry --- water and sediment factor --- transverse distribution --- wandering river channel --- Wuliangsuhai Lake --- ecological water demand --- ecological water supplement --- ecological function --- heavy metals --- sediment interstitial water --- sediment --- chemical fraction --- ecological risk --- water quality characteristics --- cause --- groundwater --- middle and lower reaches of the Yellow River --- water rights allocation --- coordinated development --- water–ecology–energy–food --- emergy method --- Yinchuan city --- return period --- Pearson-III distribution --- “7.20” rainstorm --- Yiluo River basin --- Xiaohua section --- soil erosion --- influencing factors --- RUSLE --- the optimal parameters-based geographical detector --- scale effects --- the Yellow River Basin --- Sanhe region --- early sites --- spatial and temporal distribution --- human-territorial relationship --- GIS --- high-quality development --- environmental regulation --- local government competition --- panel threshold regression model --- Yellow River basin --- the ancient Yellow River distributary --- early settlements --- aggregation characteristics --- Zhengzhou --- n/a --- water-energy-food --- water-ecology-energy-food --- "7.20" rainstorm